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19381-D02 PM200 User Manual Rev 1.0

1. 2011 Thorlabs 3 Operating Instruction 3 6 Zoom Zoom The P icon enlarges the main screen if subpanels are active they are closed the P icon returns to the standard view 3 7 Delta This feature can be used to observe power drifts adjust power to a certain level or quickly subtract ambient light By pressing the Delta A button the main readout value will show the difference between the reference value that is the value in the moment of pressing the delta button and the actual reading In needle view both the needle scale and the additional numeric readout show the difference In numeric view 2 additional subpanels appear Delta Reference shows the reading in the moment of pressing the Delta button while in the panel Actual the actual absolute reading is displayed the difference of both is displayed as main readout value In case if logarithmic display the difference will be displayed in dB Negative values indicate that the actual value is less than the reference 3 8 Zeroing The zeroing function can be accessed in the numeric or needle view panel To perform a zero adjustment it is important to properly cover the power sensor with a light tight shield and after then pressing the ZERO button The zero adjustment will fail and show a warning when the detected zero value is too large for the connected sensor e g when accidentally hitting the zero button under light exposure to the sensor Do not hold a sen
2. D A v Optical Power and Energy Meter PM200 Operation Manual sme dB senda 10OHZ ee 635NM meee 140W w 7 66 E A 20 408 uW 83 416 W 4 087 1 11 098 dBm 2011 ORES Version 1 0 0 Date 29 07 2011 Copyright 2011 Thorlabs Contents Foreword 1 General Information 1 1 Safety 1 2 Ordering Codes and Accessories 1 3 Requirements 1 3 1 Hardware Requirements 1 3 2 Software Requirements 1 3 3 Interface Requirements 2 Installation 2 1 Parts List 2 2 Operating Elements 2 3 Getting Started 3 Operating Instruction 3 1 Attenuation Correction 3 2 Wavelength Correction 3 3 Bandwidth 3 4 Range Control 3 5 Measurement Views 3 5 1 Numeric View 3 5 1 1 Subpanels 3 5 2 Needle View 3 5 3 Graph and Statistics Display 3 5 4 Calculator 3 5 5 File Manager 3 6 Zoom 3 7 Delta 3 8 Zeroing 3 9 Min Max Marker Reset 3 10 Additional Measurement Settings 3 11 Settings 3 12 Analog Output 3 13 Auxiliary Input and Output 3 14 Charging the Battery 3 15 Sensor Dependent Functions 3 15 1 Photodiode Sensors 3 15 2 Thermal Sensors 3 15 3 Pyroelectric Sensors 3 16 Application Note OORLAS oo onNnnNnN oR A OW oy WBWNHNNNNNNNNNNNN N BF FPA a aa na Aa ONN ODDO PRP WWAWONH Sa HO OO aa FP BND ND ORES 4 Computer Interface 4 1 PM200 Utility Software 4 2 PM200 Software Update 4 3 Using the Instrument Drivers 4 4 PM200 SCPI Commands 4 4 1 An Introduction to the SCPI language 44 2 lEEE488
3. 20 2011 Thorlabs display area 3 Operating Instruction 3 5 4 Calculator The calculator can be reached via the Measurement viewsl s panel This tool helps to choose a suitable sensor Enter the laser type beam shape and dimensions and laser parameters the calculator derives beam parameters essential for sensor choice and outputs a list of suitable sensor heads Below are two examples for CW and pulsed lasers 2011 Thorlabs Wed Jul 13 2011 11 32 02 Heads CW Sensor Damage Name Threshold 121C lt 5 5130C lt 5 6140C lt 5 5142C lt 5 5302C lt 5 5310C lt 5 6314C lt 5 5322C lt 5 5350C lt 5 C70 e 5O Derived Beam Parameter Beam Shape Circular Input Beam Parameter Diameter mm 4 3 Area 14 52 mm2 Wavelength 635 nm Avg 75 0 mw Power mW Power Density 516 5 mw cm2 Max Power 75 Auto Fill Beam Parameter Calculator for CW Lasers Wed Jul 13 2011 11 16 20 Laser Heads Sensor Damage Name Threshold 6370C lt 5 Pulsed Beam Shape Circular Input Beam Parameter Derived Beam Parameter Diameter mm 43 Area 14 52 mm Avg 1550 sein 30 0 mw Avg eee 375 0 p Power Sake 206 6 mW cm Peak egies 80 Power 3 8 kw Pulse Width 100 Peak Power 25 8 AiE Auto Fill Energy 2 6 n cm2 Beam Parameter Calculator for Pulsed Lasers Wavelength Avg Power 30 Max Energy Densitv 21 PM200 3 5 5 File Manager The fil
4. For the measurement of power levels from nano watts up to 20 W Thorlabs offers photodiode sensors that show big advantages in sensitivity stability and drift compared to thermal sensors The sensors are built up in a combination of a photodiode and a neutral density filter or a photodiode in combination with an integrating sphere They provide linearity over several decades and show a very good sensitivity at smallest power levels down to the pW range Handling fairly small power levels the sensor size can be held small further the response time of such sensors is very fast down to the sub microsecond range Photodiodes neutral density filters and also integrating sphere materials show a wavelength dependent behaviour and therefore each sensor is individually calibrated over the whole spectral working range in 5 or 10nm steps The sensors spectral response data calibration data get stored in a non volatile memory inside the DB 9 sensor connector and downloaded to the PM200 when plugged to the unit To perform an accurate measurement it is necessary to enter the operating wavelength of the incident light The PM200 then calculates the light power from the measured photo current using the correct responsivity value from the wavelength calibration table Bandwidth Setting Signal Filtering The analogue bandwidth setting influences the power reading and the analog output The bandwidth can be selected in the measurement settings panel or direc
5. Queries the bandwidth of the photodiode inut stage Sets the thermopile accelerator state Queries the thermopile accelerator state Sets the thermopile accelerator to auto mode Queries thermopile accelerator auto mode Sets thermopile time constant 0 63 ins Queries the thermopile time constant in s Sets default sensor adapter type Queries default sensor adapter type 2011 Thorlabs 4 Computer Interface 4 4 2 3 7 Measurement commands INITiate IMMediate Start measurement l e 2011 Thorlabs 57 PM200 4 4 3 Simple LabVIEW Example using SCPI commands mw PM100D Simple Example vi This VI shows how to communicate with a PM200 optical power energy meter with SCPI commands The following steps are demonstrated within this application Initializing the instrument Getting system info Setting parameters Measurement configuration Measuring queue Fetching and displaying a measurement value Closing the application Thorlabs PM200 P3000118 0 8 1 S144c osooso DOCO OOOO Block diagram SSS SSS A O Default pp rre EEE EEEE Error log IDN String Sensor Name Sensor SN PM1000 CLOSE 58 2011 Thorlabs 4 Computer Interface DN String Sensor Name Sensor SN D crs Pifbrar oper Search Instruments Initialize Instrument Configure Operation Registers a Em stop Measurement Value Selection Sensor Name Sensor SN 2 7 T
6. e 3 vOLT v IDN String Search Instruments Initialize Instrument Configure Operation Registers Averaging Rate Sets the averaging rate 3000 averages take approximately 1s for performing a new measurement value Readout Config Selects the measurement parameter POW power measurement in W CURR current measurement in A VOLT voltage measuremetn in V ENER energy measurement in J FREQ frequency repetition rate measurement in Hz PDEN power density measurement in W cm EDEN energy density measurement in J cm RES thermistor resistance measurement in Ohm TEMP temperature measurement in C Stop Stops application Timeout ms Sets a timeout value in ms that allows the instrument to sample The timeout must be longer than it takes to perform a new measurement This has especially to be considered when performing single shot energy measurements 2011 Thorlabs 59 PM200 60 Error log Error indicator no error is suppressed Readout string Formatted measurement value limitation to 4 significant digits SI notation decimal separator appended unit according readout configuration New Indicator lights up when a new measurement value is processed Sensor Flags Sensor flag bitmap 1 Is power sensor 2 Is energy sensor 16 Response settable 32 Wavelength settable 64 Tau settable 256 Has temperature sensor Sensor Name Name of connected power energy sensor Sensor SN Se
7. with some limitations due to the hardware capabilities 4 4 2 3 1 SYSTem subsystem commands ee a S Query level of SCPI standard 1999 0 SCPI Vol 2 21 21 Sets the instrument s line frequency setting to 50 or 60Hz SCPI Vol 2 21 13 Query the instrument s line frequency setting SCPI Vol 2 21 13 EE IDN Query information about the connected sensor This is a query only command The response consists of the following fields lt name gt lt sn gt lt cal _msg gt lt type gt lt subtype gt lt flags gt lt name gt Sensor name in string response format lt sn gt Sensor serial number in string response format lt cal_msg gt calibration message in string response format lt type gt Sensor type in NR1 format lt subtype gt Sensor subtype in NR1 format lt flags gt Sensor flags as bitmap in NR1 format Flag Dec value Is power sensor 1 Is energy sensor 2 Response settable 16 Wavelength settable 32 Tau settable 64 Has temperature sensor 2011 Thorlabs 51 PM200 4 4 2 3 2 STATus subsystem commands starus Path to STATus subsystem SCPIVOL2 20 Path to control operation event registers 52 2011 Thorlabs 4 Computer Interface 4 4 2 3 3 DISPlay subsystem commands Path to DISPlay subsystem SCPI Vol 2 8 Set the display birghtness SCPI Vol 2 8 2 Return the display birghtness value SCPI Vol 2 8 2 Set the display contrast SCPI Vol 2 8 4 Return the dis
8. 2011 Thorlabs 4 Computer Interface subsystem is shown below to illustrate the tree system SENSe CORRection COLLect ZERO INI Tiate ABORt STATe MAGNitude BEAMdiameter M Nimum MAXimun DEFault lt numeric_value gt mm BEAMdiameter MI Nimum MAXimun DEFault WAVelength MINimum MAXimun lt numeric_value gt nm WAVelength M Nimum MAXi mun POWer PDIode RESPonse MINimunm MAXimum DEFault lt numeric_value gt A RESPonse MINimum MAXimun DEFault THERmopile RESPonse M Nimum MAXimun DEFault lt numeric_value gt V RESPonse MINimum MAXi mum DEFault SENSe is the root keyword of the command CORRection is the second level keyword and COLLect and BEAMdiameter are third level keywords and so on A colon separates a command keyword from a lower level keyword Command Format The format used to show commands in this manual is shown below CURRent DC RANGe MINimum MAXimun lt numeric_value gt A CORRection BEAMdiameter MINimunm MAXimun DEFault lt numeric_value gt mm The command syntax shows most commands and some parameters as a mixture of upper and lower case letters The upper case letters indicate the abbreviated spelling for the command For shorter program lines send the abbreviated form For better program readability send the long for
9. NI VISA runtime version on the PC available on the National Instruments website www ni com or from the data carrier that comes with the instrument Allow installing and follow the dialog instructions The PM200 comes with an utility software that easily enables remote operation of the PM200 and also PM100D PM100A and PM100USB and visualizing and logging measurement data Perform the setup exe and follow the installing instructions The LabVIEW source code of this application is included on the data carrier as well and can be used to build own applications or to modify the utility program to specific requirements LabVIEW 8 5 1 or higher required 4 1 PM200 Utility Software The PM200 comes with an utility software that easily enables remote operation of the PM200 as well as PM100D PM100A and PM100USB along with visualizing and logging of measurement data The software is written in LabVIEW 8 5 1 and can either be installed from the data carrier as executable where LabVIEW isn t required on the PC or can be run with LabVIEW 8 5 1 or higher The source code of the application is included on the data carrier and can be used to build own applications or to modify the utility program to specific requirements The PM200 utility software does not require the installation of the instrument drivers as described in section Using the Instrument Drivers sl After launching the PM200 utility program it will automatically screen for connec
10. it is recommended to use an integrating sphere based sensor from the S14xC series Another good choice for fiber based measurements are the S15xC series Fiber Heads They plug directly to the meter and go without a disturbing cable between sensor and console Energy Measurement with Pyroelectric Sensors To select the best suitable pyroelectric energy sensor the following parameters must be considered Energy to Measure The maximum energy is determined by the absorption layer too high pulse energy causes mechanical damages on the layer and by the sensor material that must remain in a certain temperature level It is important to pay attention to the maximum power density during a pulse the maximum energy density and the average power The lower detection limit depends of the resolution and the minimum settable trigger level of the display unit as well as on the noise level To minimize the 2011 Thorlabs 37 PM200 38 noise level and ground loops it is advisable to mount the detectors isolated with the supplied isolation adapters Beam Diameter The active area of the detector should be chosen slightly larger than the beam diameter It is not a must that the beam should cover most of the sensor area but maximum allowed energy density has to be considered Repetition Rate The maximum pulse repetition rate depends on the combination of the internal capacitance of the detector and the load resistor The disp
11. must be connected In order to measure the energy a response curve of the used pyroelectric sensor must be loaded If no responsivity curve is available the PM200 uses a default responsivity of 1J W and only peak voltage measurement is possible Please take care for the correct polarity of the thermal element the negative contact needs to be connected to analog ground pin 3 It s important that the response curve file is a true comma separated values file the separator must be a comma not a semicolon Less important is the file extension it can be a txt file as well The response curve file must not contain a header Set the Sensor Type to Pyroelectric Detector in the Measurement Settings panel For correct energy measurement the response curve csv file of the used thermal element must be loaded e Copy the appropriate csv file from an external flash memory e g USB stick to the folder LOCAL gt response curves using the File Manager e Click to the Pyro Adapter tab in the upper left corner of the display click to the select curve button on the screen bottom e Select from the LOCAL gt response curves folder the desired file and hit the select Y button 32 2011 Thorlabs 3 Operating Instruction The responsivity curve now will be displayed and used for calculations If no responsivity curve is available the PM200 uses a default responsivity of 1V J and only peak voltage me
12. to an internal temporary file After the record is finished or has been stopped the measurement data can be permanently stored to the internal logging drive or the USB drive The data format is comma separated csv and contains e measurement value e time stamp e additional settings e sensor information The record stopping criteria can be selected to manually elapsed time or 2011 Thorlabs 19 PM200 number ofdetected samples in the measurement settings page as well as the interval between two records Note Please note that the temporary file will be overwritten after pressing the start button or when pressing the reset button during record Some buttons and functions will not be accessible during the record is running During the record it is possible to quickly swap between the Graph and the Statistic View as in the following screen shots Measurement Views Start Stop Record 5 76418e 05 Save Record GrapivArea f Load Record File Info Measurement Settings Graph Device Settings Navigation Graph View Wed Apr 27 2011 T 24 40C 09 41 08 RH 38 3 Actual 77 92 UW 11 08dBm Minimum 77 61uW 11 10dBm Maximum 79 41uW 11 00dBm Mean 78 78uW 11 04dBm Standard Deviation 381 3nW Ratio 10274 0 10dB Samples Se Ba gt ae 200 5 La lL SS 7 79435e 05 7 85431e 05 7 91427e 05 g Statictics View By clicking to the histogram area the histogram will be displayed in the entire
13. 00 Fax 46 31 703 40 45 www thorlabs com Email scandinavia thorlabs com China Thorlabs China Oasis Middlering Centre 3 Building 712 Room 915 Zhen Bei Road Shanghai China Tel 86 21 32513486 Fax 86 21 32513480 www thorlabs hk Email chinasales thorlabs com 2011 Thorlabs
14. 2 Common Commands 4 4 2 1 Command Summary 4 4 2 2 Command Reference 4 4 2 3 PM200 specific SCPI Command Reference 4 4 3 Simple LabVIEW Example using SCPI commands 5 Maintenance and Service 5 1 Troubleshooting 6 Appendix 6 1 Sensor Connector Pinning 6 2 Technical Data 6 3 Certifications and Compliances 6 4 Warranty 6 5 Copyright 6 6 Thorlabs End of Life Policy WEEE 6 7 Listings 6 7 1 List of Acronyms 6 7 2 Thorlabs Worldwide Contacts 39 39 43 44 44 44 49 49 50 51 58 62 62 63 63 64 67 68 69 70 71 71 72 ORES We aim to develop and produce the best solution for your application in the field of optical measurement technique To help us to live up to your expectations and improve our products permanently we need your ideas and suggestions Therefore please let us know about possible criticism or ideas We and our international partners are looking forward to hearing from you Thorlabs GmbH Sections marked by this symbol explain dangers that might result in personal injury or death Always read the associated information carefully before performing the indicated procedure ATTENTION Paragraphs preceeded by this symbol explain hazards that could damage the instrument and the connected equipment or may cause loss of data This manual also contains NOTES and HINTS written in this form Please read these advices carefully 2011 Thorlabs 3 PM200 1 General Information The PM200 Hand
15. 54 C Alt Unit Ratio 4 795 dBm 1 000 1 Power density Delta Reference 4 3 mMW cm 3 016 mW 3 016 mW Up to 6 subpanels can be enabled by drag and drop to the measurement screen To remove items the container needs not to be opened just pick the item and drag it back to the container Frequency The PM200 can measure and display frequencies of pulsed modulated or chopped light sources up to 100kHz The maximum measurable frequency is depending on the sensor type and instrument settings The measured frequency is displayed in a subpanel Alternative Unit Depending on the sensor type alternative measurement units are available and can be selected in both the numeric and needle view panels by clicking to the appropriate unit Photodiode sensors they deliver a current proportional to the incident power but also wavelength dependent e W nW pW mW 16 2011 Thorlabs 3 Operating Instruction e A nA pA mA e dBm 1mW 0 dBm Thermal sensors they deliver a voltage proportional to the incident power e W nW W mW e V mV e dBm 1mW 0 dBm Pyroelectric sensors they deliver a voltage peak proportional to the incident pulse energy e J mJ e V mV Power Energy Density The calculation is based on the beam parameters entered in Measurement Settings panel Band in the next panel 13 Thu Jul 28 2011 11 44 14 Measurement Settings Beam parameters 120C Wavelength 6 35
16. Language Date Time Power Options System Info Sensor Info Settings page Gives an overview about all relevant measurement parameters and beam settings the logging control parameters and the remote state Opens the Measurement Settings and Tools panel Gives access to the user space on the local drive for administering logging files and user defined correction curves Controls display brightness display orientation and operation and display color schemes Sets the dialog language between English French German Spanish Italian and simplified Chinese Sets the time and date Configures power saving schemes for both battery and mains operation Shows system relevant data and triggers the software updatel s via USB stick Shows sensor relevant data and the spectral response curve To return to the measurement view press the arrow button in the operating bar 2011 Thorlabs 25 PM200 3 12 Analog Output The analog output provides the amplified photo diode current or the amplified thermal or pyroelectric sensor voltage The signals from the analog output are not wavelength and zero corrected The analog output voltage can range from 0 3V to 2 3V It is is measurement range dependent and can be calculated to gt measured value U out 27 x full scale value 3 13 Auxiliary Input and Output This 12 pin connector in the top panel gives access to an external trigger input 4 configurable genera
17. Tau can be entered in the Measurement Settings panel Accelerator modes are the same as for S3xxC sensors 3 15 3 Pyroelectric Sensors Pyroelectric sensors allow the energy measurement of short light pulses The PM200 works with Thorlabs ES1xxC and ES2xxC series pyroelectric power sensors The sensor will be ready to operate few seconds after plugging to the DB9 connector Refer to the sensor data sheet and pay attention to the optical damage threshold Exceeding these values will permanently destroy the sensor A pyroelectric sensor converts the incident energy pulse into a voltage pulse largely independent of the incident radiation wavelength The amplitude of this voltage pulse is proportional to the laser pulse energy and is measured by a peak detector circuit The voltage peak decays in time so the max repetition rate is limited When a pyroelectric sensor is connected the PM200 cannot be switched to auto range mode The measurement value will be updated with each incoming pulse When no pulses appear the measurement display will be held on the last measured value until the Reset Min Max 2 button will be pressed Trigger Level The trigger level can be set either directly by clicking to the value in the measurement panel or from the Measurement Settings panel When an incoming pulse exceeds the set trigger level the peak detector circuit gets armed and is waiting until the pulse peak is reached After finding the maxi
18. able extra displays From this panel also graph and statistics measurement panelsl s can be selected Additionally the File Managerlz and the Calculatorlz can be started 3 5 1 Numeric View Mon Jul 18 2011 12 01 09 Attenuation 0dB Bandwidth 100kHz Wavelength 470n m Auto Range 7i il OmW 40 8 314 dBm Sensor Temperature 28 981 C The upper part of the display important measurement settings are displayed 2011 Thorlabs 15 PM200 These settings can be changed either in the Measurement settings menulzs or directly by clicking to the appropriate item In the bottom of the display additional parameters can be displayed see Subpanelslic Precision of the Readout Value The precision of the power or energy readout can simply be changed by clicking on the power or energy value in the numeric or needle screen The reading will toggle between 3 4 or 5 significant digits Units of Measure The units of measure can be selected by clicking on the measurement unit in the numeric or needle display A list box will open and offer sensor depending choices of the selectable measurement unit in W dBm J Aor V 3 5 1 1 Subpanels In the numeric display it is possible to configure supplementary displays Click to the a Choice of available depending on the connected sensor subpanels will appear below shown for a S120C sensor Available Subpanels Frequency Maximum Sensor Temperature Hz 3 017 mW 28 6
19. andle the laser pulse repetition rate A connected USB stick is recognized but not read out e Try another USB stick If you cannot resolve your issue using above hints please contact Thorlabs 721 62 2011 Thorlabs 6 Appendix 6 Appendix 6 1 Sensor Connector Pinning The PM200 is capable to support custom made detectors Please read carefully the following instruction prior to connecting a self made sensor 5 4 3 2 1 9 8 7 6 Pin out of the 9pin DSUB sensor connector female pin connection 3 AGND analog ground photodiode ground anode thermal and pyro sensor ground photodiode cathode pyroelectric sensor thermal sensor PRESENT Connect this pin via a 1kQ 10kQ resistor to pin 3 AGND to enable a custom sensor N OO fF 1 5V max current 50mA from this pin 6 DGND digital ground 9 n C Warning Pin 2 is uniquely used for the EEPROM Digital I O memory in Thorlabs sensor heads and MUST NOT be used Connecting this pin may cause malfunction of the PM200 2011 Thorlabs 63 PM200 6 2 Technical Data Features Detector Compatibility Photodiode Sensors S100C Series Thermal Sensors S300C Series Pyroelectric Sensors ES100C ES200C Series Photodiodes Max 5 mA Thermopiles Max 1 V Pyros Max 100 V Display Type 5 7 TFT 640 x 480 Pixels 18 bit Color Display Update Rate max 100 Hz Display Format Numerical Bargraph Trendgraph Statistics Simulated Analog Needle Backlight Dis
20. asurement is possible 2011 Thorlabs 33 PM200 3 16 Application Note Choosing the right sensor The question of the right sensor depends on many factors starting with the light source to measure and the application No sensor can cover all applications the following table shows the main pros and contras of the different power sensor types Of course this can only be a rough guide because within each sensor group there are special models best suitable for specific applications Power Sensors Serene 2 A EOLICA CEARA OO E i Ee Pee Ee ee Pn alee eee Se eee Pn nna Pn nae ss Be Preferred Useable Useable with some restrictions Not useable Reducing Noise for High Accuracy Measurements Main disturbing influence on each measurement is induced by grounding noise the cable capacitance temperature effects stray and ambient light and detector noise The housing of power sensors are connected to the digital ground of the meter and should be linked to earth ground e g via a post energy sensors should be mounted isolated because the housing is connected to the console s 34 2011 Thorlabs 3 Operating Instruction analog ground The sensor cable conducts very small current or voltage signals Moving the cable will induce disturbances given through the cable capacitance For measuring low power or energy levels the cable should be fixed in position With photodiode sensors the bandwidth sh
21. ation The last step is to enter the correct wavelength 3 15 2 Thermal Sensors The PM200 is compatible to the Thorlabs S3xxC series thermal power sensors The sensor will be ready to operate few seconds after plugging to the DB9 connector Refer to the sensor data sheet and pay attention to the optical damage threshold Exceeding these values will permanently destroy the sensor Thermal sensors absorb the incident laser power and convert the developing heat into a small voltage caused by heat flow through thermocouple elements between absorbing area and sensor heat sink Thorlabs S3xxC series thermal sensors cover a wide range of applications The sensors are available with different coatings Black broad band coating as absorber does not need a wavelength correction because the response is nearly flat from UV to mid IR wavelengths Special hard coatings can withstand high power levels and show also a good spectral flatness Further Thorlabs offers special heads with coatings for very high peak power levels for Excimer lasers with large beam diameters and short pulse lasers The output voltage of a thermal sensor is linear to the incident laser power as long the thermal system is properly zeroed The main application for thermal sensors is the measurement of high power levels from 100mW up Thorlabs offers also a special thermally isolated thermal head with flat response for measurement of a power level starting in the yW range Readout a
22. auto ranging function on and off MIN MAXi ie m m amim Sets the current range in W lt numeric_valuje gt W MI Ni I ee 1 i Queries the current range MAXi mum REFerence MINimum MAXimum DEFault Sets a delta reference value in W lt numeric_value gt Ww REFerence MI Nimum r i L Queries the delta reference value MAXimun DEFault J Pwrraseoa SSCS nase SSCS CO UPP MIN MAXi mum Se er Man ea Sets the current range in V lt numeric_valuje gt V UPP MI Ni mum er L Amai Queries the current range MAXi mum REFerence MINimum MAXimum DEFault Sets a delta reference value in V lt numeric value gt V PEAKdetector fe O 51 HReshold MI Ni mum MAXi mum DEFault Sets the trigger level in for the energy mode lt numeric value gt THReshold MINimun Queries the trigger level setting MAXimun DEFault 2011 Thorlabs 55 PM200 4 4 2 3 6 INPut subsystem commands commans rsinton INPut PDIode FILTer LPASs STAT STAT THERmopile ACCelerat TATe TATe e OFF 0 ONI 1 e or OFF O ONI 1 AUTO OFF 0 ONI 1 TAU MI MAXi mum lt numeric TAU MAXi mum 56 Nimum DEFault _value gt s MI Nimum DEFault HOTodiode Ro Sets the bandwidth of the photodiode input stage
23. cceleration Thermal sensors show a fairly slow response When laser power hits the active area it takes some time to reach the correct power indication This settling time may take depending on the sensor type from a few up to 20 seconds As the settling time time constant is well known for each sensor type a special electronic circuitry can shorten this time to approximately 1 3 seconds by predicting the final power value The PM200 automatically uses the right adjustment of the electronics to the time constant of the recognized thermal sensor Nevertheless this circuitry has the disadvantage of inducing some noise to the measurement value Therefore the acceleration circuit can be disabled enabled in the Measurement Settings 2011 Thorlabs 29 PM200 panel Accelerator on off auto In auto mode the accelerator will switch on when a power change larger than 5 of the measurement range is detected and switch off after 5 times of the time constant of the sensor This feature provides a fast response and keeps the noise level to a minimum on constant power levels Custom Thermal Elements Custom thermal elements can be used for power measurements with the PM200 Therefore to the sensor input see Sensor Connector Pinningles the thermal element to pin 8 and an interlock 1 10 kQ between pin 7 and pin 3 must be connected In order to measure the power a response curve of the used thermal element must b
24. d number of user wavelengths and spectral curves of light sources that will be used for calculating the spectrally corrected power or energy value Wavelength 63 5 nm By clicking to the wavelength value a drop down list appears with saved wavelength value The menu item Edit opens the editor panel The editor panel instantly appears when clicking to the Wavelength button 12 2011 Thorlabs 3 Operating Instruction RH 36 59 AN Range 400nm 1100nm 635nm 635 nm 660nm 700nm 2 800nm 1000nm 1064nm 1100nm 5 1088nm 7 8 0 V Wavelength Editor Panel Left side of the panel User created wavelength list with scroll arrows Depending on the connected sensor the list items appear in standard color for a valid value or in red for a value that is out of the sensor wavelength range The selected wavelength will show in the edit window Right side of the panel e Wavelength range of the connected sensor e Edit Window with selectable units e Numeric input field Icons Add item to the list x Delete item from the list y Overwrite item in the list with new value Load spectral curve Quit editor A specialty of the PM200 is the possibility to load spectral curves of broadband light sources These files must be in comma separated format csv can be loaded from the USB drive and will be stored in the user space of the local drive 2011 Thorlabs 13 PM200 3 3 Bandwidth Depending o
25. diameter larger than 10 of the active sensor area diameter Another important parameters are the maximum allowed power and energy densities of the sensor The maximum ratings are given in the sensor spec sheet The PM200 can display the actual power or energy density for a known beam diameter For high power or high energy beams a good efficiency can be reached to chose a detector that has a active area diameter about 20 30 larger than the beam diameter Fiber Based Measurements Laser light emits from an optical fiber in a conical shape with an angle twice the acceptance angle of the fiber The acceptance angle is calculated by the numerical aperture of the fiber and is defined as the inverse sine of the numerical aperture For typical single mode fiber connectorized with a PC ferrule the total angle of the emitted light is between 15 and 25 for an angled connector APC the cone shifts by approximately 4 from the fiber axis This expansion of the beam has to be considered to avoid overfilling the detector and getting wrong results On the other hand for measurements with high power fiber lasers a certain gap between fiber tip and detector surface has to be kept to decrease the power density Thorlabs offers fiber adapters with the most common connectors that are verified with the S12xC series optical sensors and with most thermal sensors For large divergence angles or fiber measurements that are critical to back reflections
26. e sampling until reset ratio max min value sampling until reset power or energy density alternate unit depending on connected sensor Available choices depend on the connected sensor The display has the following configurable items the possible choices depend on the connected sensor no display minimum value sampling until reset frequency or repetition rate temperature resistance of temperature sensor The bargraph indicator shows the incidence or the used measurement range Statistical values in linear and logarithmic representation Shows the logging history data displays histogram data Power Energy Chart Press to open a dialog box for setting the measurement range The indicator in the button shows the currently used measurement range in the chosen unit A green light indicates auto ranging Shortcut Shift F 1 Press this button to open a dialog box for setting the correction wavelength or in adapter mode to enter the responsivity value in A W or V W The currently used parameter is indicated in the button label Shortcut Shift F2 Measurement configuration button 2011 Thorlabs Depending on the connected sensor the following parameters can be set in the dialog box 41 PM200 Units Display button display resolution set number of digits averaging rate a rate of 3000 averages the incoming measurement values for approx 1 second photodiode bandwidt
27. e Administrator privileges on the PC which you are performing the install Prior to connecting the PM200 with a PC please check if NI VISA is installed on the PC otherwise install NI VISA that is available for free from the National Instruments website www ni com or from the data carrier that came with the instrument After successfully installing the drivers connect the PM200 to a USB port of your PC The PC will find a PM200 test and measurement device Please follow the instructions of the dialog screens and allow the installing Instrument Driver Example The following LabVIEW example demonstrates how to use the instrument drivers for measurement tasks The example is included on the data carrier that came with the instrument The Measure command blocks all activities until a new measurement Set Timeout to a value Set Averaging value is generated that allows to complete Rate the measurement Resource p R Instr RI PoooH Timeout pee Els 4 4 PM200 SCPI Commands 4 4 1 An Introduction to the SCPI language The PM200 interface commands use the SCPI Standard Commands for Programmable Instruments an ASClIl based command language that was designed for test and measurement instruments SCPI commands are based on a hierarchical structure also known as a tree system In this system associated commands are grouped together under a common node or root thus forming subsystems A portion of the SENSE 44
28. e 13 44 58 1 1509E 4 W i i I iI i Instrument Setup C Long Term Measurement 114u 115u 116u 117u 118U 13 44 58 1 1511E 4 Ww v J 4 Al f Ej Y Scale 11 57 Scale Fit Map Mode X Scale Scale Fit Power Energy Chart 116 5u 116 0u ee 115 0u 114 5u naonn PM100 Utility 113 5u i 1 1 1 1 1 1 1 1 1 1 i i i i i 1 1 1 1 Version 3 3 4 1 50 100 150 200 250 300 350 400 450 SOO 550 600 650 700 750 800 850 900 950 1000 15 Jun 2010 Samples www thorlabs com Description of the Front Panel Elements Header This indicator shows the device setup console type PM200 serial number of the console sensor type sensor serial number Main Display The display has a configurable display resolution Independent from the measurement range the display always has the full number of the selected digits To achieve best AD converter resolution it is necessary to set the measurement range according to the signal to measure A trigger indicator shows whether the unit is sampling data A indicator or a new measurement value gets displayed 40 2011 Thorlabs Left Sub Display Right Sub Display Bargraph indicator Statistics screen Data logging screen Histogram Power Energy histogram Chart display Range button Wavelength Response button 4 Computer Interface T indicator and green light The display has the following configurable items no display maximum valu
29. e loaded If no responsivity curve is available the PM200 uses a default responsivity of 1V W and only voltage measurement is possible Please take care for the correct polarity of the thermal element the negative contact needs to be connected to analog ground pin 3 It s important that the response curve file is a true comma separated values file the separator must be a comma not a semicolon Less important is the file extension it can be a txt file as well The response curve file must not contain a header Set the Sensor Type to Thermal Detector in the Measurement Settings panel For correct power measurement the response curve csv file of the used thermal element must be loaded e Copy the appropriate csv file from an external flash memory e g USB stick to the folder LOCAL gt response curves using the File Manager e Click to the Thermo Adapter tab in the upper left corner of the display click to the select curve button on the screen bottom e Select from the LOCAL gt response curves folder the desired file and hit the select Y button The responsivity curve now will be displayed and used for calculations If no responsivity curve is available the PM200 uses a default responsivity of 1V W and only voltage measurement is possible 30 2011 Thorlabs 3 Operating Instruction Accelerator settings Different from S3xxC series for a custom thermal element the time constant
30. e manager gives access to the LOCAL system drive the user space and if connected to an external USB flash drive The following folders in the local drive are pre configured and cannot be changed e light sources Tables of spectral curves of broadband light sources that can be loaded to the wavelength list and selected for the wavelength correction of the power or energy readout e logging Administer data records e response curves Tables of spectral response curves for custom detectors e temp Temporary file for data logging This folder contains the latest record file e transmissions Tables of transmission curves that can be loaded to the attenuation menu to use for the spectral correction of the power or energy readout All files can be copied to and from the USB drive To remove a custom folder the folder must be selected opened The rename copy and paste function is only available for files not for directories Above default folders cannot be deleted nor renamed Current path Remove Directory Create Directory File Handling 22 LOCAL gt w Remove New Dir Name B jgiit sources logging Size response curves s temp i transmissions Rename E USB m Up Date Modified 26 04 2011 15 00 21 04 2011 13 06 26 04 2011 15 38 27 04 2011 09 40 21 04 2011 09 55 File manager One Directory Up Toggle between USB and Local Exit File Manager
31. e numeric parameters will accept all commonly used decimal representations of numbers including optional signs decimal points and scientific notation Special values for numeric parameters like MINimum MAXimum and DEFault are also accepted You can also send engineering unit suffixes with numeric parameters e g M K Or u If only specific numeric values are accepted the power energy meter will automatically round the input numeric parameters The following command uses a numeric parameter POWer REFerence MINimum MAXimun DEFault lt numeric_value gt W Discrete Parameters Discrete parameters are used to program settings that have a limited number of values like w ppm They can have a short form and a long form just like command keywords You can mix upper and lower case letters Query responses will a ways return the short form in all upper case letters The following command uses discrete parameters POW UNIT W DBM Boolean Parameters Boolean parameters represent a single binary condition that is either true or false For a false condition the power energy meter will accept orr or o For a true condition the meter will accept on or 1 When you query a boolean setting the instrument will always return o ori The following command uses a boolean parameter CURRent RANGe AUTO OFF O ONI 1 String Parameters String parameters can contain virtually any set of ASCII characters A stri
32. erically in addition to the green and red markers on the power bar 0 20 40 60 80 100 120 140 These values will update permanently The Reset Min Max button will reset the displays to zero and restart the measurement sampling The ratio value will show nan No A Number when a negative reading occurs 18 2011 Thorlabs 3 Operating Instruction Delta Reference is the reference power value when the console measures the deviation Delta measurement Actual is the measured value This display is useful when performing Delta measurements in this mode the main display shows the deviation from the delta reference value so in a Subpanel the actual power can be displayed Sensor temperature Most of Thorlabs photodiode and thermal sensors are equipped with a NTC Thermistor to control the temperature of the sensor head To show the sensor temperature pick the Sensor Temperature subpanel and drop it to the main view 3 5 2 Needle View Attenuation OdB Bandwidth 100kHz Wavelength 470nm Auto Range 7 10mMW _ gt _ 3 3896 w In contrast to the numeric view the needle view offers additionally a needle gauge with min and max indicators Subpanels are not available 3 5 3 Graph and Statistics Display For recording visualizing and analyzing the measurement data in Watts or Joules over time the PM200 features a scope view and a statistics analysis with a histogram view During the record the data will be stored
33. est Enable Register Service request enable query Reads the Service Request Enable Register Status byte query Reads the Status Byte Register Self test query the unit s self test and returns the Wait to continue command Wait until all previous commands are executed 2011 Thorlabs 49 PM200 4 4 2 2 Command Reference IDN identification query read identification code The identification code includes the manufacturer model code serial number and firmware revision levels and is sent in the following format THORLABS MMM SSS X X X Where MMM is the model code SSS is the serial number X X X is the instrument firmware revision level OPC operation complete set OPC bit OPC operation complete query places a 1 in output queue When OPC is sent the OPC bit in the Standard Event Register will set after all pending command operations are complete When OPC is sent an ASCII 1 is placed in the Output Queue after all pending command operations are complete Typically either one of these commands is sent after the INI Tiate command The INI Tiate command is used to take the instrument out of idle in order to perform measurements While operating within the trigger model layers many sent commands will not execute After all programmed operations are completed the instrument returns to the idle state at which time all pending commands including OPC and or OPC are executed After the last pendin
34. from an external flash memory e g USB stick to the folder LOCAL gt response curves using the File Manager e Click to the PD Adapter tab in the upper left corner of the display click to the select curve button on the screen bottom e Select from the LOCAL gt response curves folder the desired file and hit the select Y button The responsivity curve now will be displayed and used for calculations If no responsivity curve is available the PM200 uses a default responsivity of 1A W and only photo current measurement is possible eA Thorlabs FDS100 CAL calibrated photo diode s n 10112420 is used with PM200 e The calibration data can be downloaded from Thorlabs website search for the item FDS100 CAL on the product site a table can be found e Select the tab Calibration Data enter the serial number and download the provided calibartion data file FDS100 CAL 2010112420 103280830 txt to a USB memory stick e Edit the file and remove the header lines e Connect the USB memory stick to the PM200 e Copy the file to the folder LOCAL gt response curves using the File Manager e Click to the PD Adapter tab in the right upper corner of the display click to the select curve button on the screen bottom 28 2011 Thorlabs 3 Operating Instruction e Select from the LOCAL gt response curves folder the desired file and hit the select button Now the response curve is displayed and used for calcul
35. g command is executed the OPC bit and or an ASCII 1 is placed in the Output Queue When OPC is sent the OPC bit in the Standard Event Register will set after all pending command operations are complete When OPC is sent an ASCII 1 is placed in the Output Queue after all pending command operations are complete RST reset return instrument to defaults When the RST command is sent the instrument performs the following operations e Returns the instrument to the default conditions e Cancels all pending commands e Cancels response to any previously received OPC and OPC commands TST self test query run self test and read result Use this query command to perform the instrument self test routine The command places the coded result in the Output Queue A returned value of zero 0 indicates that the test passed other values indicate that the test failed WAI wait to continue wait until previous commands are completed The WAI command is a no operation command for the instrument and thus does not need to be used It is there for conformance to IEEE488 2 50 2011 Thorlabs 4 Computer Interface 4 4 2 3 PM200 specific SCPI Command Reference See also SCPI Specification Version 1999 0 May 1999 http www scpiconsortium org All commands with a SCPI checkmark are described in the SCPI specification All described commands work also with the PM100D PM100A and PM100USB instruments
36. gy sensor The sensors have a self fixing mechanism To plug or unplug a sensor slightly press from both sides on the pins in the connector housing Sensors can be hot swapped to the console after recognizing a new valid sensor the type and calibration data will be downloaded to the console in a few seconds and the unit is ready to operate with the new sensor Turn on the unit by pressing the power button in the side panel After switching on the unit the touch screen display will come up with a boot screen for about 30 seconds and then jump to the last measurement screen before power down 10 2011 Thorlabs 2 Installation 3 Operating Instruction The PM200 supports all Thorlabs C Series photodiode thermal and pyroelectric sensors These can easily identified against older versions of Thorlabs power or energy sensors by their red connector housing The console will not recognize sensors from the A and B series Please contact Thorlabs for upgrading of old sensors with C Series connectors To plug or remove a sensor slightly press the two bolts in the connector housing Sensors can be hot swapped to the console after recognizing a new valid sensor the type and download of the calibration data the console is ready to operate with the new sensor The PM200 also supports custom detectors please refer to chapter Photodiode Sensorsl27l Thermal Sensorsls0 or Pyroelectric Sensorsl 2 and to the connecto
37. h HI and LO acceleration circuit for thermal sensors ON AUTO and OFF trigger level for pyroelectric sensors Zeroing for photodiode and thermal sensors Shortcut Shift F3 A dialog box with the following items appears configure unit of measure depending on the connected sensor W J dBm V and A configure the left sub display configure the right sub display Shortcut Shift F4 Logging configuration button Opens a dialog box to Start Stop log button Reset Clear button Quit button set averaging rate for logging set interval between samples set number of samples configure logging into data file Shortcut Shift F5 start and stop data logging Shortcut Shift F6 reset min max monitor clear power energy graph clear power energy histogram clear power energy statistics clear log screen Shortcut Shift F7 stops the PM200 application to restart press the white arrow in the tool bar Shortcut Shift F8 Instrument Setup Save Recall save recall remote control specific parameters Shortcut Shift F9 Long Term Measurement 42 sets the device to local mode between the measurement intervals Shortcut Shift F10 2011 Thorlabs 4 Computer Interface 4 2 PM200 Software Update Download the PM200 Update Package from Thorlabs web site and copy it to the root directory of a USB flash drive Connect Open Measurement Sett
38. held Optical Power and Energy Meter is designed to measure the optical power of laser light or other monochromatic or near monochromatic light sources and the energy of pulsed light sources The space saving battery powered design and compatibility to all Thorlabs C Series Photodiode Thermal Pyroelectric sensors and custom Photodiode Thermal and Pyroelectric detectors combined with a fast USB device interface open a wide range of applications in Manufacturing Quality Control Quality Assurance and R amp D for stationary and field use The provided software including drivers and applications for LabVIEW and C makes it easy to integrate the instrument in test and measurement systems The PM200 can be operated through its auto detecting position sensor and the rotatable kick stand in both a bench top style landscape view and a hand held style portrait view Please refer to the user manual on the data carrier supplied with the unit for detailed function description 1 1 Safety Attention All statements regarding safety of operation and technical data in this instruction manual will only apply when the unit is operated correctly as it was designed for The power meter PM200 must not be operated in explosion endangered environments All modules sensors and externally connected devices must only be operated with properly shielded connection cables Only with written consent from Thorlabs may changes to single components be carr
39. his instruction manual to be error free Thorlabs is not liable for consequential damages Restriction of warranty The warranty mentioned before does not cover errors and defects being the result of improper treatment software or interface not supplied by us modification misuse or operation outside the defined ambient stated by us or unauthorized maintenance Further claims will not be consented to and will not be acknowledged Thorlabs does explicitly not warrant the usability or the economical use for certain cases of application Thorlabs reserves the right to change this instruction manual or the technical data of the described unit at any time 68 2011 Thorlabs 6 Appendix 6 5 Copyright Thorlabs GmbH has taken every possible care in preparing this Operation Manual We however assume no liability for the content completeness or quality of the information contained therein The content of this manual is regularly updated and adapted to reflect the current status of the software We furthermore do not guarantee that this product will function without errors even if the stated specifications are adhered to Under no circumstances can we guarantee that a particular objective can be achieved with the purchase of this product Insofar as permitted under statutory regulations we assume no liability for direct damage indirect damage or damages suffered by third parties resulting from the purchase of this product In no event shal
40. ied out or components not supplied by Thorlabs be used Do not remove covers This precision device is only serviceable if properly packed into the complete original packaging including the plastic foam sleeves If necessary ask for a replacement package 4 2011 Thorlabs 1 General Information 1 2 Ordering Codes and Accessories PM200 Handheld Power Energy Meter Console Photodiode Power Sensors Order Code Type Detector Aperture Wavelength Power mm nm W si2ove s121c S1220 Dual Range 500n 500m Dual Range 50n 50m Dual Range 1200 1800 500n 500m sisac S154C Fiber Head 700 1700 100p 5m 2011 Thorlabs 5 PM200 Thermal Power Sensors Order Code Type Aperture Wavelength Power mm nm W 302C Thermally Stabilized O12 190 25000 100yu 2 Thermal Absorber 310C Thermal Surface Absorber 1490 25000 10m 10 314C Thermal Surface Absorber 125 190 10600 10m 60 322C Thermal Surface Absorber 1925 190 10600 100m 250 350C Thermal Surface Absorber 40 190 1100 10m 60 Excimer Coating and 10600 370C Thermal Volume Absorber 25 400 5200 10m 15 for high peak power lasers Pyroelectric Energy Sensors Order Code Type Aperture Wavelength Energy mm nm J ES111C Pyroelectric Sensor with O11 185 25000 10yu 150m broadband coating ES120C Pyroelectric Sensor with 20 185 25000 100yu 500m broadband coating ES145C Pyroelectric Sensor with 45 185 25000 500y 2 br
41. ings panel and call System Info the following screen appears Device name not available Serial number not available Calibration date not available Software version 0 3 0 Software Update W update software Click to update software make sure the power supply is connected Software Update Wizard P The Software Update Wizard will help you to perform a software update for your PM200 i Next Cancel Software Update Wizard ff Connect an USB flash drive containing the software image A Back SiNext Cancel Connect the USB flash drive then click next In the next screen click Finish to start the update Warning Do not turn off the console during update Do not remove the USB flash drive during update Wait until update has completed Upon completing the update on the screen appears the message Please remove update jumper an reboot Now remove the USB flash drive and press and hold the power button until the PM200 switches off To reboot switch on again 2011 Thorlabs 43 PM200 4 3 Using the Instrument Drivers Instrument Driver Installation The PM200 software package contains a set of instrument drivers that allow conveniently remote controlling the instrument in most common programming languages The instrument drivers must be installed please follow the setup dialog instructions Note To successfully complete the install of the PM200 USB driver you must hav
42. l any liability exceed the purchase price of the product Please note that the content of this User Manual is neither part of any previous or existing agreement promise representation or legal relationship nor an alteration or amendment thereof All obligations of Thorlabs GmbH result from the respective contract of sale which also includes the complete and exclusively applicable warranty regulations These contractual warranty regulations are neither extended nor limited by the information contained in this User Manual Should you require further information on this product or encounter specific problems that are not discussed in sufficient detail in the User Manual please contact your local Thorlabs dealer or system installer All rights reserved This manual may not be reproduced transmitted or translated to another language either as a whole or in parts without the prior written permission of Thorlabs GmbH Status 2011 Copyright Thorlabs GmbH All rights reserved 2011 Thorlabs 69 PM200 6 6 Thorlabs End of Life Policy WEEE As required by the WEEE Waste Electrical and Electronic Equipment Directive of the European Community and the corresponding national laws Thorlabs offers all end users in the EC the possibility to return end of life units without incurring disposal charges This offer is valid for Thorlabs electrical and electronic equipment sold after August 13 2005 marked correspondingly with
43. l purpose input output GPIO pins and two 10bit ADC inputs With the optional available environmental module that can be plugged into this connector it is possible to monitor the room temperature and the relative humidity in the status bar 3 14 Charging the Battery The PM200 is powered by a 2 cell LiPo battery that needs to be recharged intermittently by plugging the AC adapter To fully charge the battery it takes approximately 4 hours A built in charging circuit automatically regulates and terminates the charging Note Charging via the USB cable to a computer might not sufficiently compensate the power consumption of the PM200 Following battery icons in the display header show the charging state from empty to full battery and line operation eee amp The empty battery symbol starts blinking one minute prior to the automatic shut down of the PM200 When an external power supply is connected the symbols above change sequentially until the battery is fully charged after then the power cord icon will appear 26 2011 Thorlabs 3 Operating Instruction 3 15 Sensor Dependent Functions 3 15 1 Photodiode Sensors The PM200 works with all Thorlabs S1xxC series photodiode power sensors The sensor is ready to operate few seconds after plugging to the DB9 connector Attention Refer to the sensor data sheet and pay attention to the optical damage threshold Exceeding these values will permanently destroy the sensor
44. lay unit has an input resistor of 1MQ like the typical input resistor of an Oscilloscope Pulse Length Thorlabs energy sensors detect and measure pulses from sub nano seconds duration up to approximately 2 ms Generally the pyroelectric effect allows just the measurement of a temperature change caused by radiation pulses or modulated radiation For shorter impulses there are no restrictions as the energy of the shortest impulse is converted into heat flow in the absorption layer The maximum impulse duration depends on several factors One is the electrical time constant given by the detector capacity and the load resistance the other is the thermal time constant of the detector which must not influence the measurement result Wavelength The sensors are calibrated at one wavelength for the entire wavelengths a sensor specific correction curve is stored in the memory in the sensor connector The black coating is nearly linear flat over a wavelength range from 185nm to gt 25um the ceramic coating is also suitable for this wavelength range but is not linear 2011 Thorlabs 3 Operating Instruction 4 Computer Interface The PM200 optical power meter contains a USB 2 0 interface for remote controlling the unit with an external PC Connect the unit via the Mini USB connector in the top panel to a free USB port of your PC When connecting the PM200 first time a new hardware will be found For proper installing the PM200 it requires a
45. light hits the active area or when the heat sink gets hot under light exposure The zero value will be negative when the heat sink is hotter than the active area and positive when the active area is hotter than the heat sink When both heat sink and active area are at room temperature a zero voltage of some UV is normal 3 9 Min Max Marker Reset In the main display two markers green and red in numeric view green and yellow in needle view display the minimum and maximum measured power values The icon resets these two markers 3 10 Additional Measurement Settings The measurement settings page can beached via the settings pagelzs then press 13 There are listed various sensor dependent configuration items Common for all sensors e wave length correction e attenuation e measurement units e ranging e line filter for anti aliasing Photo diode sensors bandwidth Pyroelectric sensors trigger level Thermal Sensors accelerator speed up circuitry settings Also in this panel the following settings can be made e Beam characteristic parameters for calculating the power or energy density e Configuration of the PM200 for customer built sensors e Long term logging control 24 2011 Thorlabs 3 11 Settings 3 Operating Instruction To access the settings page press the cog wheel button in the operating bar The Settings panel comes up Measurement Application is File Manager 22 Display Settings
46. m 2011 Thorlabs 45 PM200 For example in the above syntax statement curR and CURRENT are both acceptable forms You can use upper or lower case letters Therefore CURRENT current and Current are all acceptable Other forms such as cur and curren will generate an error Braces enclose the parameter choices for a given command string The braces are not sent with the command string A vertical bar separates multiple parameter choices for a given command string Triangle brackets lt gt indicate that you must specify a value for the enclosed parameter For example the above syntax statement shows the range parameter enclosed in triangle brackets The brackets are not sent with the command string You must specify a value for the parameter Such as CURR DC RANG 50E 6 Some parameters are enclosed in square brackets The brackets indicate that the parameter is optional and can be omitted The brackets are not sent with the command string In this example DC can be omitted so the command string can be shortened to CURR RANG 50E 6 If you do not specify a value for an optional parameter the power energy meter chooses a default value Command Separators A colon is used to separate a command keyword from a lower level keyword You must insert a blank space to separate a parameter from a command keyword If a command requires more than one parameter you must separate adjacent parameters usi
47. mum voltage the level is kept and the microprocessor reads the AD converted voltage for displaying the pulse energy Finally the peak detector circuit gets a reset and is ready for the next pulse The trigger level can be adjusted between 0 and 99 of each selected energy range Only pulses that are higher than the adjusted trigger level are recognized by the PM200 The trigger level should be set between the noise level and the expected pulse height Average Power Measurement With continuously repeating pulses the PM200 calculates the average power 2011 Thorlabs 31 PM200 from the pulse energy and the repetition rate For displaying the average power drag and drop the appropriate subpanel to the numeric view panel Repetition Rate The pulse repetition rate in Hz can be displayed in the Frequency subpanel Power Energy density The precondition to measure the correct power and or energy density is a well known beam area Therefore select in Measurement Settings panel the applicable beam shape Square rectangular or circular and enter the beam size Average power density in W cm and energy density in J cm are then displayed in the appropriate subpanels Custom Pyroelectric Sensors Custom pyroelectric detectors can be used for energy measurements with the PM200 Therefore to the sensor input see Sensor Connector Pinninglss the pyroelectric sensor to pin 5 and an interlock 1 10 KQ between pin 7 and pin 3
48. n the sensor type the measurement bandwidth can be selected This can be useful to lower the impact of sensor noise to the measurement result particularly at low power levels 3 4 Range Control Up to 6 current measurement ranges corresponding to power measurement using photo diode sensors and 4 voltage measurement ranges for power measurement using thermal sensors or energy measurement using pyroelectric sensors can be chosen manually with the A or V buttons near the measurement unit UW or by opening a list box when clicking on the measurement range value Auto Range 140uW For power measurements an auto ranging function is available that can be activated by clicking on the Range label toggle function or via the list box which appears when clicking on measurement range value 14 2011 Thorlabs 3 Operating Instruction 3 5 Measurement Views This menu can be reached via the button Mon Jul 18 2011 11 54 55 Measurement Views 77 66 en 90 27 Numeric Needle Statistic Tools PN Calculator File Manager The different measurement views can be easily selected after pressing the views button For most applications the numericlis and the needlel is view will be the best choice for an excellent visible and quickly configurable power or energy readout The interactive touch areas allow fast access to all settings and the drag and drop box gives up to 6 useful free configur
49. ng a comma as shown below SYST TIME 10 34 48 A semicolon is used to separate commands within the same subsystem and can also minimize typing For example sending the following command string CORR BEAM 1 WAVE 1310 Is the same as sending the following two commands CORR BEAM 1 CORR WAVE 1310 Use a colon and a semicolon to link commands from different subsystems For example in the following command string an error is generated if you do not use both the colon and semicolon CORR BEAM 1 AVER 300 Using the MIN and MAX Parameters You can substitute MINimum Or MAXimum in place of a parameter for many commands For example consider the following command CURRent DC RANGe MINimum MAXimun lt numeric_value gt A 46 2011 Thorlabs 4 Computer Interface Instead of selecting a specific current range you can substitute MIN to set the range to its minimum value or MAX to set the range to its maximum value Querying Parameter Settings You can query the current value of most parameters by adding a question mark to the command For example the following command sets the operating wavelength to 1550 nm corr WAVE 1550 You can query the operating wavelength by executing CoRR WAVE You can also query the minimum or maximum operating wavelength allowed as follows CORR WAVE MIN CORR WAVE MAX Caution If you send two query commands without reading the response fr
50. ng must begin and end with matching quotes either with a single quote or with a double quote You can include the quote delimiter as part of the string by typing it twice without any characters in between The following command uses a string parameter DIAG CALString lt quoted string gt 48 2011 Thorlabs 4 Computer Interface 4 4 2 IEEE488 2 Common Commands Common commands are device commands that are common to all devices according to the IEEE488 2 standard These commands are designed and defined by this standard Most of the commands are described in detail in this section The following common commands associated with the status structure are covered in the Status Structure section CLS ESE ESE ESR SRE SRE STB 4 4 2 1 Command Summary CLS Clear status Clears all event registers and Error Queue ESE je Event enable command Program the Standard Event Enable Register ESE Event enable query Read the Standard Event Enable Register ESR Event status register query Read and clear the Standard Event Register IDN Identification query Read the unit s identification string Operation complete command Set the Operation Complete bit in the Standard Event Register Places a 1 into the output queue when all ration complet i i Operation compiere query device operations have been completed Returns the unit to the RST default condition Service request enable command Programs the Service Requ
51. nm Attenuation OdB Units W J Morag 3 10mW ti Circular 5 6 mm Line Filter 50 Hz Flat Top Bandwidth QHZ Logging control samples 100 Interval Beam shapes can be selected from a drop down menu Circular Square To change the beam dimension click into the numeric field an editor comes up 2011 Thorlabs 17 PM200 Thu Jul 28 2011 11 44 53 Aeasurement Settings Beam parameters 120C Circular 5 6 Flat Top Also beside the default flat top beam profile where the power is distributed evenly over the beam area 2 more typical cases are also considered Gaussian In case the beam shape has one significant peak the power density around the peak is much higher than on the periphery In order to consider that the calculated average power density value is doubled Hotspot Some lasers have a beam profile shaped like a donut or 2 or more significant peaks appear in the profile The power density in these hot spots is much higher than the average across the entire beam diameter The calculated average power density value is tripled Note Power density is always displayed in W cm energy density in J cm Density is measured correctly only if the connected sensor is calibrated In case a customer made sensor is used please make sure that the correct calibration coefficient is entered Min Max and Ratio These subpanels show the minimum maximum value and the ratio out of both num
52. oadband coating ES220C Pyroelectric Sensor with 20 185 25000 500yu 3 ceramic coating ES245C Pyroelectric Sensor with O45 185 25000 1m 15 ceramic coating Please visit our homepage hittp www thorlabs com for various accessories like fiber adapters posts and post holders data sheets and further information 6 2011 Thorlabs 1 General Information 1 3 Requirements 1 3 1 Hardware Requirements CPU 1 GHz or higher RAM 256 MB Graphic card with at least 32 MB memory Hard disc with at least 100 MB free storage space free USB2 0 port USB cable according the USB 2 0 specification 1 3 2 Software Requirements Operating System e Windows XP 32 bit SP3 e Windows Vista 32 bit 64 bit e Windows 7 32 bit 64 bit e VISA runtime version 5 0 3 or higher 1 3 3 Interface Requirements A free USB2 0 port is required 2011 Thorlabs 7 PM200 2 Installation 2 1 Parts List Inspect the shipping container for damage If the shipping container seems to be damaged keep it until you have inspected the contents and you have inspected the PM200 mechanically and electrically Verify that you have received the following items within the package PM200 power energy meter console Desktop power supply 5 VDC 2 4 A Power cord according to local power supply USB cable USB Type A Connector to Mini USB Connector Cable 3 5 mm Audio Connector to Flying Leads for analog outpu
53. om the first and then attempt to read the second response you may receive some data from the first response followed by the complete second response To avoid this do not send a query command without reading the response When you cannot avoid this situation send a device clear before sending the second query command SCPI Command Terminators A command string sent to the power energy meter must terminate with a lt new line gt character The IEEE 488 EOI end or identify message is interpreted as a lt new line gt character and can be used to terminate a command string in place of a lt new line gt character A lt carriage return gt followed by a lt new line gt is also accepted Command string termination will always reset the current SCPI command path to the root level IEEE488 2 Common Commands The IEEE 488 2 standard defines a set of common commands that perform functions like reset self test and status operations Common commands always begin with an asterisk are four to five characters in length and may include one or more parameters The command keyword is separated from the first parameter by a blank space Use a semicolon to separate multiple commands as shown below SRST CLS ESE 32 OPC SCPI Parameter Types The SCPI language defines several different data formats to be used in program messages and response messages 2011 Thorlabs 47 PM200 Numeric Parameters Commands that requir
54. or description EC Declaration of Conformity EMC Meets intent of Directive 2004 108 EC 1 for Electromagnetic Compatibility Compliance was demonstrated to the following specifications as listed in the Official Journal of the European Communities EN 61326 2006 EMC requirements for Class A electrical equipment for measurement control and laboratory use including Class A Radiated and Conducted Emissions 234 and Immunity 234 IEC 61000 4 2 Electrostatic Discharge Immunity Performance criterion B IEC 61000 4 3 Radiated RF Electromagnetic Field Immunity Performance criterion A IEC 61000 4 4 Electrical Fast Transient Burst immunity Performance criterion B FCC EMC Compliance Emissions comply with the Class A Limits of FCC Code of Federal Regulations 47 Part 15 Subpart B 234 EC Declaration of Conformity Low Compliance was demonstrated to the following specification as listed in Voltage the Official Journal of 5 European Communities Low Voltage Directive 2006 95 EC EN 61010 1 2001 Safety requirements for electrical equipment for measurement control and laboratory use UL 61010 1 2 ed Safety requirements for electrical equipment for measurement control and laboratory use CAN CSA C22 2 No 61010 1 2 ed Safety requirements for electrical equipment for measurement control and laboratory use IEC 61010 1 2001 Safety requirements for electrical equipment for measurement control and laboratory use Equipment E
55. ould be set to LOW setting with thermal sensors the acceleration circuit should be shut off or set to AUTO The detector noise is lowest with Silicon or InGaAs sensors For long term measurements in free space applications it is necessary to provide constant ambient light conditions or shielding the beam The temperature should be stable over the time of the measurement Power Measurement of Pulsed Signals The PM200 will read the average value of a pulsed signal when the following conditions apply e For a thermal sensor pulse length repetition rate and peak power is uncritical as long as the peak power is lower than the damage threshold of the sensor A thermal sensor reacts very slow and will integrate the power incident on the active area of the sensor e With a photodiode sensor that can follow short pulses in the ns range it is important that the pulse peak power is within the maximum power range of the sensor It is also important that the power range is set that the peak power is within this range otherwise the reading will clip at the range end and lead to a wrong average value Further it is important to use a power range in manual mode that can measure the peak value therefore the Min Max function is very helpful Depending on the pulse length and repetition rate the bandwidth setting will influence the power reading It is recommended to use the low bandwidth 10Hz setting for a stable display when the pul
56. play LED Adjustable Features Rotatable Two Position Kickstand Removable Rubberboot Touch Pen Fixture for Optional Fiber Inspection Camera Current Input Photodiode Sensors Connector DBOF Left Side Units W dBm W cm A Measurement Ranges 6 Decades 50 nA 5 mA Ranges Selectable in W Sensor Dependent Display Resolution 1 pA Responsivity Value A W AD Converter 16 bit 0 2 f s 5 UA 5 mA 0 5 f s 50 nA Measurement Ranges 4 Decades 1 mV 1 V Ranges Selectable in W Sensor Dependent Display Resolution 1 uV Responsivity Value V W AD Converter 16 bit 0 5 f s 10 mV 1 V 1 f s 1mV Time Constant Correction Range 64 2011 Thorlabs Accuracy Accuracy 6 Appendix Connector 2 x 6 Pins 0 1 Socket Top Side External Trigger Input Function 4x GPIO 2 x 10 bit ADC Sensor Temperature Control Temperature Measurement Range 10 C to 80 C Type Speaker 300 Hz 5 kHz Function Laser Tuning Support Console Function Support Memory Type Nand Flash Size 128 MB Connector Device USB Type A Left Side 2011 Thorlabs 65 PM200 Operating Temperature Range 0 40 C Storage Temperature Range 40 to 70 C Dimensions W x H x D 170 mm x 125 mm x 38 mm Weight 0 57 kg 1 non condensing All technical data are valid at 23 5 C and 45 15 rel humidity non condensing 66 2011 Thorlabs 6 Appendix 6 3 Certifications and Compliances Category Standards
57. play conrast value SCPI Vol 2 8 4 4 4 2 3 4 CALibration subsystem commands COUNt lt value COUNt RRection LOSS INPut MAGNitude MINimum MAXi mum DEFault lt numeric_value gt LOSS INPut MAGNitude MI Ni mum MAXimun DEFault EAMdiameter MIN MAXimum DEFault lt numeric_value gt m BEAMdi ame MAXi mum DI WAVelengt MAXi mum lt numeric valu WAVelength MINi mumi MAXi mum 2011 Thorlabs Path to CALibration subsystem SCPI Vol 2 5 Returns a human readable calibration string This is a query only command The response is formatted as string response data Path to SENSe subsystem SCPI Vol 2 18 Sets the averaging rate 1 sample takes approx 3ms Queries the averaging rate Sets a user attenuation factor in dB Queries the user attenuation factor Performs zero adjustment routine Aborts zero adjustment routine Queries the zero adjustment routine state Queries the zero value Sets the beam diameter in mm Queries the beam diameter Sets the operation wavelength in nm Queries the operation wavelength 53 PM200 PDI Ode LR R RI ESPonse MINimum AXi mum DEFault lt numeric_value gt A RI ESPonse MI Ni mum MAXi mum EFault ERmopile RI ESPonse MINimum AXimum DEFault lt numeric_value gt V ESPonse MI Ni m
58. quipment Type Equipment Type Test and measuring and Test and measuring Safety Class Class equipment as defined in IEC 60950 1 2001 1 Replaces 89 336 EEC 2 Compliance demonstrated using high quality shielded interface cables 3 Emissions which exceed the levels required by these standards may occur when this equipment is connected to a test object 4 Minimum Immunity Test requirement 5 Replaces 73 23 EEC amended by 93 68 EEC 2011 Thorlabs 67 PM200 6 4 Warranty Thorlabs warrants material and production of the PM200 for a period of 24 months starting with the date of shipment During this warranty period Thorlabs will see to defaults by repair or by exchange if these are entitled to warranty For warranty repairs or service the unit must be sent back to Thorlabs The customer will carry the shipping costs to Thorlabs in case of warranty repairs Thorlabs will carry the shipping costs back to the customer lf no warranty repair is applicable the customer also has to carry the costs for back shipment In case of shipment from outside EU duties taxes etc which should arise have to be carried by the customer Thorlabs warrants the hard and software determined by Thorlabs for this unit to operate fault free provided that they are handled according to our requirements However Thorlabs does not warrant a fault free and uninterrupted operation of the unit of the software or firmware for special applications nor t
59. r pin outles From the main menu all functions can be reached by clicking to the appropriate icon Mon Jul 18 2011 2 11 51 29 D E Attenuation OdB Bandwidth 100kHz Wavelength 635nm Auto Range 3 10uW 0 00 4 w Console Info Type and serial number Opens external USB memory File managerl22 Battery statusl 2 1 Measurement Views 5 Zooms In the actual display Deltal 23 measurement mode Svd dg 2011 Thorlabs 11 PM200 Zeroingl23 the sensor Resets min maxl24 labels Settings 251 panel 3 1 Attenuation Correction The attenuation menu can be used to apply an additional external related correction factor to the power or energy reading e g filter The handling is similar to the wavelength correction it is possible to create a list with dedicated attenuation items in dB or loading complete spectral transmission curves in comma separated format Note Attenuation must be entered always as a positive value e g 10dB The software allows to enter negative values as well but this would be equivalent to an amplification If the attenuation curve e g of a filter is loaded and selected it can be easily displayed in the Sensor panel Comparing the graphics in tab curve with the tab eff curve the superposition of the sensor s response curve and the filter curve can be seen 3 2 Wavelength Correction The PM200 allows the creating and administering of a nearly unlimite
60. rial number of connected power energy sensor IDN String Answer from instrument on idn command manufacturer model number serial number firmware version Readout value Plain readout value in full resolution PM100D_Initialize vi This VI scans for connected devices that can be selected ina dialog box Next steps setting timeout performing identification query configuring the operation register to 512 flag gets to HI when a new measurement value is ready to fetch Clear operation register PM100D_Write vi Writes a SCPI command to the connected instrument 2011 Thorlabs PM100D Sonror Flaq PM100D Confiq Fotch PM100D SYST PMi00D CLOSE 4 Computer Interface PM100D_Read vi Reads data from the connected instrument All query commands according the SCPI command table are terminated by a question mark PM100D_SensorFlag vi This VI queries all relevant sensor info with SYST SENS IDN sensor name sensor serial number calibration message sensor type sensor sub type sensor flags PM100D_ConfMeas vi CONFigure measurement CONF lt parameter gt POW ENER etc ABORt measurement Clear operation register with STAT OPER INITiate measurement PM100D_SYST ERR vi This VI lists all errors coming from the instrument with the command SYST ERR no error is suppressed PM100D_Close vi Closes the VISA session Sets the connected instrument in local mode defa
61. se should be monitored via the analog output the bandwidth should be set to 100kHz Line width of Light Sources The line width of light sources can be neglected only when using a broadband thermal or pyroelectric sensor Photodiode sensors show a strong dependency of the responsivity vs operating wavelength so if the line width of light sources is greater than 10nm e g LED there may be an influence on the displayed power To achieve the best result for broadband light sources with a photodiode sensor it is necessary that the response curve is nearly linear over the line width When entering the center wavelength of the light source as operation wavelength the PM200 will nearly show the right optical power for a symmetrical spectral response shape 2011 Thorlabs 35 PM200 Note PM200 allows to load a spectral curve of a light source having a broad line width If select such a spectral curve instead of a center wavelength from the Wavelength drop down menu the PM200 will calculate the optical power correctly Spectral intensity curves for Thorlabs LED are available as EXCEL files from our web site Temperature Effects on Thermal Sensors Thermal sensors react on any temperature differences that occur between thermal disc and heat sink Influence to the measurement result can be caused by airflow disturbances or by heating up the heat sink through long term exposure of the laser beam to the thermal disc To avoid dis
62. sor in the hand especially a thermal sensor when performing a zero adjustment Temperature effects will influence the quality of the zeroing result When measuring very small power levels dark current of photodiode sensors or zero voltage on thermal sensors will have an influence on the measurement result and must be compensated by the zero adjustment An indicator that a sensor needs to be zeroed is when with covered sensor either a negative power reading or areading much greater than zero is displayed After performing a zero adjustment the detected zero value will be included in all power readings in Watts or dBm The basic units A V will still measure the absolute values without zero correction The detected zero value may influence the wavelength corrected calculated full scale power range values in the lower 2011 Thorlabs 23 PM200 power ranges also there might be a zero shift in the bar graph representation In logarithmic dBm representation the unit cannot display negative values In this case the display will show nan Not A Number Photodiode sensors emit small current levels even when no photons hit the active area the so called dark current that is temperature dependent and in the region of some nA for silicon and InGaAs sensors and up to some WA for germanium sensors Thermopile sensors need to be zeroed when thermal differences between active area thermal disk and the sensor heat sink appear when no
63. t Adapter for the auxiliary connector in the top panel USB memory stick Flash Drive 1 GB with instrument drivers user application and operation manual Quick Reference Certificate of Calibration NOOR WN Optional Accessories e Environmental Measurement Module Displays Temperature and Relative Humidity e Fiber Inspection Camera Module Monochrome Fiber Inspection Camera with Power Measurement Capability 8 2011 Thorlabs 2 Installation 2 2 Operating Elements 0dB 10Hz 635nm 140yuW 77 66 B 20 408 uW 83 416 uW 4 087 1 11 098 dBm Front Panel LED indicators for Standby mode and Charging Touch pen Touch screen display Removable protective silicone rubber boot D OCN Rear Panel 5 Four position rotatable and two flap position adjustable stand 6 Adaptor for optional fiber inspection camera 2011 Thorlabs 9 PM200 Side View 7 ON OFF button 8 DC Input DC 5V 2A 9 USB host for flash drive and fiber inspection camera 10 Analog Output 0 2V DC 11 Optical head input Top View 12 Auxiliary In Output ext Trigger 4 x GPIO 2 x ADC 13 USB Device PC remote operation 14 Ambient Light Sensor 2 3 Getting Started For first use plug in the power supply and allow 4 hours charging the battery During the charging process the right LED indicator lights up even when the unit is turned off Connect a suitable Thorlabs C series power or ener
64. ted console devices Select the desired device and press o k In case that the connected console is not yet recognized press Rescan to perform a new search for connected devices Connected Devices E Select Device from List and Press OK USB0 0x1313 0x8080 P3000116 INSTR A v 2011 Thorlabs 39 PM200 The identification string contains the following items USBO USB Port number 0x1313 Thorlabs Vendor ID 0x80B0 Product ID PM200 P3000116 Instrument serial number INSTR Measurement instrument device Front Panel El PM100 Jo PM100 Series a LANES Logging Parameters Count 1000 13 45 00 1 1505E 4 w A Optical Power and Energy Meters as Samples 1000 Min 114 834UWV 9 399dBm 13 45 00 1 1518E 4 W Interval 0 10s Max 115 459WY 9 376dBm 12 45 00 1 1507 E 4 W PM200 SN P3000116 Sensor 5120C SN 09091521 Kreraang I Mean 115158uW 9 387dBm Bape 10E W a Log to File FALSE RMS 115158uw 9 387dBm 1245 00 1 15356 z 4 13 44 59 1 1539E 4 W Sigma 134 7450 13 44 59 1 1546E 4 Ww 400 13 44 59 1 1529E 4 W m 350 Histogram Intervals 10 13 44 59 1 1545E 4 Ww A E 13 44 59 1 1543E 4 W 300 V 13 44 59 1 1515E 4 W 250 13 44 59 1 1535E 4 W 13 44 59 1 1514E 4 W Min 113 6uW Max 122 0uW 2 134450 1 181464 CO 150 13 44 59 1 1517E 4 W 13 44 58 1 1529E 4 W 50 13 44 58 1 1512E 4 W Log Config Start Log Reset Clear Quit 13 44 58 1 1521E 4 W W
65. the crossed out wheelie bin logo see Figure 58 sold to a company or institute within the EC currently owned by a company or institute within the EC still complete not disassembled and not contaminated As the WEEE directive applies to self contained operational electrical and electronic products this end of life take back service does not refer to other Thorlabs products such as e pure OEM products that means assemblies to be built into a unit by the user e g OEM laser driver cards e components e mechanics and optics e left over parts of units disassembled by the user PCB s housings etc Waste treatment on your own responsibility If you do not return an end of life unit to Thorlabs you must hand it to a company specialized in waste recovery Do not dispose of the unit in a litter bin or at a public waste disposal site WEEE Number Germany DE97581288 Ecological background It is well known that waste treatment pollutes the environment by releasing toxic products during decomposition The aim of the European RoHS Directive is to reduce the content of toxic substances in electronic products in the future The intent of the WEEE Directive is to enforce the recycling of WEEE A controlled recycling of end of life products will thereby avoid negative impacts on the environment Crossed out Wheelie Bin symbol 70 2011 Thorlabs 6 Appendix 6 7 Listings 6 7 1 List of Acronyms The following acron
66. tly in numeric needle view panels as to 10Hz 1kKHz or 100kHz For measuring CW or average power from pulsed sources the bandwidth should be set to 10Hz When using the analog output to control external equipment or measuring peak power levels the 100kHz setting is recommended so that the meter can follow the signal Power Measurements using Photo Diodes Common photo diodes can be used for power measurements with the PM200 Therefore to the sensor input see Sensor Connector Pinningles the photodiode 2011 Thorlabs 27 PM200 cathode to pin 4 and an interlock 1 10 kQ between pin 7 and pin 3 must be connected In order to measure the power a response curve of the used photo diode must be loaded If no responsivity curve is available the PM200 uses a default responsivity of 1A W and only photo current measurement is possible Please take care for the correct polarity of the photo diode the anode needs to be connected to analog ground pin 3 Set the Sensor Type to Photodiode Detector in the Measurement Settings panel For correct power measurement the response curve csv file of the used photo diode must be loaded It s important that the response curve file is a true comma separated values file the separator must be a comma not a semicolon Less important is the file extension it can be a txt file as well The response curve file must not contain a header e Copy the appropriate csv file
67. turbances it is recommended to shield the sensor as good as possible from airflow and to zero it properly in the operating condition That means for short term measurements zero the cold sensor for long term measurements zero the sensor when it is in a state of thermal stability e g after 10 minutes light exposure Ambient and Stray Light Ambient or stray light can strongly affect the measurement accuracy in free space applications A permanent background light level can be subtracted by conducting a zero adjustment More complicated is varying ambient light like daylight or turning on off room light In such cases the only solution is a proper light shielding of the sensor Back Reflection Photodiodes ND filters and even black coatings of thermal sensors show a certain kind of back reflection of the incoming light For example the back reflection to a diode or HeNe laser can distort the power stability of the laser therefore it is recommended to slightly tilt the power meter sensor in the laser beam When back reflection must be avoided it is advised to use an integrating sphere based S14xC series sensor where the incoming light gets nearly completely absorbed in the sensor Beam Diameter vs Active Sensor Area Most sensors except integrating spheres are not completely uniform in their response over the active area To overcome uniformity issues the incident beam 36 2011 Thorlabs 3 Operating Instruction should have a
68. ult option 2011 Thorlabs 61 PM200 5 Maintenance and Service Protect the PM200 from adverse weather conditions The PM200 is not water resistant Attention To avoid damage to the instrument do not expose it to spray liquids or solvents The unit does not need a regular maintenance by the user It does not contain any modules and or components that could be repaired by the user himself If a malfunction occurs please contact Thorlabs 721 for return instructions Do not remove covers 5 1 Troubleshooting Unit does not work at all no display at the front e PM100D turned on Press On switch in the left side panel e PM100D battery discharged defect gt Plug in AC Adapter Unit automatically switches off e Check auto shutoff setting e Check battery charging symbol e Plug in AC Adapter Power or Energy reading is negative e A photodiode or thermal sensor is connected gt Check if the unit is in relative measurement mode gt Conduct the dark current adjustment procedure e A photodiode is connected gt Check the polarity of the connected photodiode e A thermal element is connected gt Check the polarity of the connected thermal element e A pyro electric element is connected gt Check the polarity of the connected pyro element Pulse energy measurement cannot be measured or is measured wrongly e Check for the right trigger level between noise level and expected pulse height e Check if energy sensor can h
69. um MAXi mum DEFault ESPonse MINimum AXimum DEFault numeric value gt V ESPonse MI Ni mum MAXi mum EFault Sets the photodiode response value in A W Queries the photodiode response value Sets the thermopile response value in V W Queries the thermopile response value Sets the pyro detector response value in V J Queries the pyro detectro response value e ae E E ae OOOO rary en site UPPer MI Nmum MAXi mum lt numeric_valuje gt A UPPer MINimum MAXi mum REFerence MAXimum D lt MINimum oe numeric value gt Sets the current range in A Queries the current range Sets a delta reference value in A REFerence MINimum Queries the delta reference value MAXimun DEFault J STATe OFF 0 ON 1 Switches to delta mode se UPPer MI Nmum MAXimum lt numeric_valuje gt J UPPer MINimum MAXi mum REFerence MAXimum D 54 MINimum EFault lt numeric value gt J Queries the delta mode state Sets the energy range in J Queries the energy range Sets a delta reference value in J 2011 Thorlabs 4 Computer Interface Command Description REFerence MI Nimum E Ut Queries the delta reference value MAXimum DEFault J STATe OFF 0 ONI 1 Switches to delta mode Frequency o pang o O LOWer _rowertioei o o Ranse o O AUTO OFF 0 ONI 1 Switches the
70. yms and abbreviations are used in this manual ADC Analog to Digital Converter CW Continuous Wave dB Dezibel DB 9 Standard 9 pin D SUB connector DC Direct Currect GPIO General Purpose Input Output LED Light Emitting Diode NTC Negative Temperature Coefficient USB Universal Serial Bus 2011 Thorlabs 71 PM200 6 7 2 Thorlabs Worldwide Contacts USA Canada and South America Thorlabs Inc 435 Route 206 Newton NJ 07860 USA Tel 973 579 7227 Fax 973 300 3600 www thorlabs com www thorlabs us West Coast Email sales thorlabs com Support techsupport thorlabs com Europe Thorlabs GmbH Hans Bockler Str 6 85221 Dachau Germany Tel 49 8131 5956 0 Fax 49 8131 5956 99 www thorlabs de Email europe thorlabs com France Thorlabs SAS 109 rue des C tes 78600 Maisons Laffitte France Tel 33 970 444 844 Fax 33 811 381 748 www thorlabs com Email sales fr thorlabs com Japan Thorlabs Japan Inc Higashi Ikebukuro Q Building 1st Floor 2 23 2 Toshima ku Tokyo 170 0013 Japan Tel 81 3 5979 8889 Fax 81 3 5979 7285 www thorlabs jp Email sales thorlabs jp 72 UK and Ireland Thorlabs Ltd 1 Saint Thomas Place Ely Cambridgeshire CB7 4EX Great Britain Tel 44 1353 654440 Fax 44 1353 654444 www thorlabs com Email sales uk thorlabs com Support techsupport uk thorlabs com Scandinavia Thorlabs Sweden AB Box 141 94 400 20 G teborg Sweden Tel 46 31 733 30

19381-D02 PM200 User Manual Rev 1.0

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