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ERM-202 User Manual V1.1

1. SPD n Set polarizer rotation speed There are four Example SPD 0 4 options for the time needed for 1 full polarizer Response EO00 if successful rotation cycle Else Enn see Table 3 for error codes 0 1 0 2 0 4 1 0s Default setting is 0 4s cycle SPD Query the current polarizer speed setting Range Example SPD 0 2 0 1s to 1s see SPD n Current setting is option 0 2s cycle IND ON Enable disable inclusion of parameter labels in Example When indicators are ON IND OFF responses to data queries response to a wavelength query is Default value ON WAV 1550 When OFF response is 1550 TYP 1 sss Set the connector type of channel 1 and channel Example TYP 1 APC to set Channel 1 TYP 2 sss 2 respectively Connector options are as APC connector APC Angled Physical Contact connector or Response E00 if successful PC Physical Contact flat connector Else Enn see Table 3 for error codes TYP 1 Query the connector type settings of Channel 1 Response TYP1 APC TYP 2 and Channel 2 respectively or TYP1 PC Else Enn see Table 3 for error codes TIM nn Set the standby time period after which the Example TIM 25 ERM 202 goes into standby if there is no user interaction nn 5 10 15 20 25 30 min or 00 standby disabled TIM Query the set standby time period after which Response Example TIM 25 the ERM 202 goes into standby if there is no Else Enn see Table 3 for error co
2. In the example above the step size is 0 6 10 0 06 Auto 2 Begin measurement on channel 2 Stop 2 Stop measurement on channel 2 Buttons common to both versions Save Store Store current measured values to the specified storage location To store the data currently displayed type or select a storage location ID 0 99 in the storage location box and click the Save or Store button Data can be stored from any measurement mode Cycle Set the number of polarizer rotation cycles averaged per measurement To select the number of polarizer rotation cycles used for averaging type or select the desired number in the cycle selection box and click the Cycle button The Response window displays the instrument response to the latest command sent In most cases the response to a successfully sent command should be E00 ERM 202 User Guide ER and Coupling Ratio ERM 202 2 only n fi ERM 202D InstrumentMain VISA vi HS ERM 202 Dual Channels Lannnal Dhatanire Milit wit THE Polarization Extinction Ratio Meter Ver 1 2 Setup Measurement Recall Function Setup Long Term Input ID if store data J Input cycle number 92 The ER amp Coupling Ratio measurement screen displays the following data ER1 Measured PER of channel 1 in dB ER2 Measured PER of channel 2 in dB P1 P1 P2 Coupling ratio P1 P1 P2 100 Channel 1 power as a percentage of the
3. M Measure ER amp DOP 3 Response Mesure er a D0P M UE Eos Input ID if store data i Store M Input ID f store data 91 Cycle is i Input cycle number 2 Input manual mode step size 910 ERM 202 2 ERM 202 1 The ER amp DOP measurement screen displays the following data ER1 Measured PER of channel 1 ER Measured PER ER2 Measured PER of channel 2 DOP Estimated DOP DOP1 Estimated DOP of channel 1 DOP2 Estimated DOP of channel 2 ER and Angle ERM 202 2 only n ERM 202D InstrumentMain VISA vi ERM 202 Dual Channels Pananal Dhatanire Uelivl WA TIULUITUM Polarization Extinction Ratio Meter Ver 1 2 Measure ER amp Angle 7 Input ID if store data J Input cycle number 92 ERM 202 User Guide The ER amp ANGLE screen displays the following data ER1 Measured PER of channel 1 in dB ER2 Measured PER of channel 2 in dB ANG1 Polarization angle of channel 1 relative to the channel 1 reference angle in degrees ANG2 Polarization angle of channel 2 relative to the channel 2 reference angle in degrees Manual ERM 202 1 only F ERM 202S InstrumentMain VISA vi x ERM 202 Single Channel Lanan Veil lui UUS Polarization Extinction Ratio Meter Ver 1 2 Setup Measurement Recall Function Setup Long Term gem EH Input ID if store data oo In
4. Select Browse my computer for driver software n o In Update Driver Software USB Serial Port COM3 Browse for driver software on your computer Search for driver software in this location CHEMIN Browse Include subfolders gt Let me pick from a list of device drivers on my computer This list will show installed driver software compatible with the device and all driver software in the same category as the device ERM 202 User Guide 3 Make sure that the software cd is inserted Click Browse navigate to the cd drive and select the VCP folder Make sure the include subfolders box is checked Click Next Would you like to install this device software Name CDM Driver Package Bus D2XX Driver I Publisher Future Technology Devices International Always trust software from Future Technology Don t Install Devices International You should only install driver software from publishers you trust How can I decide which device software is safe to install 4 The computer will ask whether to install the software Click Install J Update Driver Software USB Serial Converter MEM Windows has successfully updated your driver software Windows has finished installing the driver software for this device USB Serial Converter 5 When the installation is finished a software successfully updated message will appear This c
5. total power chi power ch2 power This function can be used for PM coupler characterization P1 P2 Power split ratio P1 P2 the ratio of power in channel 1 to power in channel 2 ERM 202 User Guide ER and Max Min ER measurement ERM 202 1 only F ERM 202S InstrumentMain VISA vi ERM 202 Single Channel Polarization Extinction Ratio Meter Ver 1 2 Measurement Recall funcion Setup Input ID if store data J Input cycle number j 1 Input manual mode step size 910 Step Size The ER amp Max Min ER measurement screen displays the following data ER Measured PER in dB results of most recent measurement MAX Maximum ER value measured during the current measurement period in dB MIN Minimum ER value measured during the current measurement period in dB To reset the Max Min values and begin a new measurement period click the Set button with Measure ER amp Max Min ER selected from the pull down menu ERM 202 User Guide ER and DOP T EEM 2620 bummentttan VBA e i ERM 202 Dual Channels L 1 Dnt ERM 202 Single Channel anaona Dhotanec Polarization Extinction Ratio Meter Ver 1 2 VOTO VI 8 HUS Polarization Extinction Ratio Meter Ver 1 2 Setup Measurement Recall Function Setup Long Term Setup Measurement Recall Function Setup Long Term il E id Auto 2 Mana Measure ER amp DOP Uni und Response
6. 12 35 ANGI 81 42 ANG2 85 97 ERM 202 2 ERM 202 User Guide r ERM 202S InstrumentMain VISA vi ERM 202 Single Channel Polarization Extinction Ratio Meter Ver 1 2 Function Setup Long Term Start ID 91 EndID 910 ER 12 71 Pow 0 50200mw Angle 80 11 Ref Angle 0 00 Pow 0 49600mw Angle 84 89 Ref Angle 0 00 MAX 12 48 MAX 12 48 DOP 93 5096 DOP 87 8696 Pow 68 31uw Angle 18 00 Ref Angle 0 00 Angle 18 00 Ref Angle 0 00 Angle 18 00 Ref Angle 0 00 MIN 14 34 ERM 202 1 The recall screen is used to retrieve stored data from memory Select the range of data to be recalled Type or use the up and down arrows to input the desired Start and End storage location IDs in the corresponding boxes and then click Recall to display the data on screen The indicator dot next to the Recall button will turn green after the data is successfully recalled Function Setup This screen is used to set and query various control parameters for general ERM 202 operation Click the buttons in the Query section to query the current settings of the corresponding parameters After a query button is clicked the corresponding indicator window will show the current stored value for that parameter To change a setting type the new value in the corresponding box on the Set side of the screen and click the Se
7. Aaa 54 Program LEE iia 55 ERM 202 User Guide Section 1 0 Overview General Photonics ERM 202 series of polarization extinction ratio PER meters provide fast accurate measurement of the polarization extinction ratio polarization angle and power of input light beams The dual channel version also automatically measures the coupling and power ratios between the two channels The instrument contains one or two optical measurement modules each consisting of a rotating polarizer driven by a motor Figure 1 a Dual and b single channel polarization extinction ratio meters 1 1 Principle of Operation Polarization extinction ratio PER is the ratio between the power in the principal polarization component of a light beam and the power in the orthogonal polarization component expressed in dB It is a measure of the linearity and degree of polarization of a polarized light source or of the polarization preserving or suppressing properties of a fiber or optical component A typical laboratory setup for measuring PER uses a rotating polarizer placed after the light source under test as shown in Figure 2 Polarizer f Light Source Photodetector Power meter Figure 2 Laboratory ER measurement setup ERM 202 User Guide The polarizer is rotated 360 degrees and the maximum and minimum output power in mW is recorded The PER is then calculated using the following equation PER 10log dB min This measurem
8. Both u Stop LJ Measure ER amp Power Response Mi Measure ER amp Power BH NEN Response Measure Er amp Power BI set po E009 input ID if store data ja Store W Input ID if store data 1 Ses rn N Input cycle number 2 el Input manual mode step size 10 Step Size Size E ERM 202 2 ERM 202 1 The ER amp Power measurement screen displays the following data ER1 Measured PER of channel 1 in dB ER Measured PER in dB ER2 Measured PER of channel 2 in dB POW Input Power in mW or pW POW1 Input power channel 1 in mW or uW ANG Polarization angle in degrees POW2 Input power channel 2 in mW or uW REF Reference angle in degrees The control buttons on the right side of the screen and the Save and Cycle buttons at the bottom of the screen are common to all of the measurement modes Their functions are as follows ERM 202 User Guide ERM 202 2 ERM 202 1 Start Both Begin measurement on both Auto Begin automatic measurement channels 1 and 2 Stop Both Stop measurement on both Stop Stop measurement channels 1 and 2 Auto 1 Begin measurement on Manual Enable manual measurement mode channel 1 polarizer angle rotates one step per click Stop 1 Stop measurement on channel Step Size Set the rotation angle in Manual 1 operation mode in multiples of 0 06 The step size range is 0 069 to 909 multiplier range is 1 to 1500
9. Dhatan ne Polarization Extinction Ratio Meter Ver 1 2 VUH UI 1 HULUIIIUJ Measurement Port Configuration Input IP Address Unsuccessful 192 168 0 74 E y Connect e Connection failed ERM 202 User Guide Program Interface The Measurement tab brings up the main measurement screen Select the desired measurement mode from the pull down menu at the bottom of the screen and click the Set button Measure ER amp Power z Measure ER 8 Power Measure ER amp Coupling Ratio Measure ER amp Max Min ER Measure ER amp DOP Measure ER amp DOP Measure ER amp Angle Measure Manual Mode ERM 202 2 ERM 202 1 Measured values displayed in the control program data window may not exactly match values displayed on the instrument s front panel This is because the refresh rates for the remote and local data displays are different and or not synchronized so they may be displaying the results of different measurements ER and Power Tl Emm 2020 Lunette Vin i E DB D E z ERM 202 Dual Channels 2 1 Dnt ERM 202 Single Channel Lanora Bhotomee Polarization Extinction Ratio Meter Ver 1 2 VOTI ur i MOUS Polarization Extinction Ratio Meter Ver 1 2 Setup Measurement Recall Function Setup Long Term Setup Measurement Recall Function Setup Long Term Start
10. Enn See Table 3 for error codes Example SAV 9 save to location 9 RCL nn Recalls the data from storage location nn and Example RCL 9 Recall data from displays it on the front panel location 9 Range for nn 00 to 99 Response Formats Response begins with display mode label 1 ER1 powerl ER2 power2 Display Mode Mode 2 ER1 P1 P1 P2 ER2 P1 P2 ER Pwr 1 3 ER1 01 ER2 02 ER power ratio 2 4 ER1 DOP1 ER2 DOP2 ER Angle 3 Else Enn See Table 3 for error codes DOP 4 ADR Query instrument GPIB address Value stored ADR xx for GPIB address xx Else in non volatile memory Range 1 30 Enn see Table 3 for error codes ADR nn Set the GPIB address to nn Range 1 30 E0O0 if successful Else Enn see Table 3 for error codes STP Stop polarizer rotation for both channels E00 if successful Else Enn see Table 3 for error codes STP 1 Stop polarizer rotation for channel 1 or E00 if successful STP 2 channel 2 respectively Else Enn see Table 3 for error codes STT Used after a STP command E00 if successful Resume a stopped measurement of both Else Enn see Table 3 for error codes channels in the mode the instrument was in before the STP command was executed STT 1 Used after a STP command E00 if successful STT 2 Resume a stopped measurement of Channel 1 Else Enn see Table 3 for error codes or Channel 2 respectively ERM 202 User Guide
11. GPIB GPIB address of ERM 202 Wavelengthx Calibrated wavelength setting Wavelength Calibrated wavelength setting for channel x Connectorx Connector type setting Connector Connector type setting PC or APC for channel x PC or APC Speed Polarizer rotation speed time in Speed Polarizer rotation speed time in seconds required for 1 polarizer rotation seconds required for 1 polarizer rotation Standtime Noninteraction period in Standtime Noninteraction period in minutes before the ERM 202 enters standby minutes before the ERM 202 enters standby Note 0 standby disabled Note 0 standby disabled Referencex Reference angle in degrees Reference Reference angle in degrees relative to which the polarization angle for relative to which the polarization angle is to be channel x is to be measured 0 corresponds measured 0 corresponds to the vertical to the vertical direction direction Long Term Monitoring The long term monitoring screen allows the user to track the evolution of measured data over time Select the measurement mode from the pull down menu at the bottom of the screen Available options are ER amp Power ER amp Coupling Ratio ER amp DOP and ER amp Angle modes for the ERM 202 2 and ER amp Power ER amp Max Min ER and ER amp DOP modes for the ERM 202 1 Set the monitoring period Monitor Time in minutes and the time interval between measurements Interval in seconds by typing
12. Response Format STE nnnn mode Result is given in terms of the unit Example STE 1002 angle multiple nnnn where For multiplier 100 Step angle nnnn 0 069 step angle 6 Range for nnnn 1 1500 MAN STE nnnn Set the angle step size for manual mode in E00 if successful Else Enn see terms of the unit angle multiple nnnn where Table 3 for error codes Step angle nnnn 0 069 Range for nnnn is 1 1500 MAN STE Rotate the polarizer by one step using the E00 if successful Else Enn see current step size setting If this command is Table 3 for error codes sent while the ERM 202 is in an operation mode other than manual mode it will switch to manual mode Table 3 Command Response Codes E00 No error Correct command received E01 Undefined Command E02 Missing parameter E03 Invalid syntax found in command string E04 String of characters too long gt buffer limit E05 Parameter has too many digits after the decimal point E06 Parameter outside the allowed range E07 Failed Self Test E08 Power too high E09 Power too low E10 Incorrect operating wavelength Outside the operating wavelength range E11 Error loading stored values E12 Unable to store state ERM 202 User Guide ERM 202 User Guide Appendix 2 0 RS 232 connection and setup 1 The RS 232 connector on the rear panel of the ERM 202 is a DB9 male connector Use a straight not cross connected RS 232 cable with DB9 female connectors to connect the ER
13. the numbers in the corresponding boxes or by using the up and down arrows Click the Start long term monitoring button to begin measurement The program will prompt the user for a file name and location to store the measured data After the file information is entered the program will begin recording data and plotting it on screen During monitoring the indicator dot at the bottom right of the screen will remain green To stop data collection before the full monitoring period has elapsed click the Stop long term monitoring button E 320 mentam SA A HL ee XC ERM 20 In ERM 202 Single Channel ll Lananal Dhataniec Dani Channels Lananal Dhatan na 9 were MER ww Polarization Extinction Ratio Meter Ver 1 2 Wert VIR TIVAUITIVM Polarization Extinction Ratio Meter Ver 1 2 E Setup Measurement Recall Function Setup Long Term Setup Measurement Recall Function Setup Long Term snot enr ds Start long term monitoring E Start long term monitoring Monitor Timelmink Dio intervals Monitor Tme min imervals GP UM ERM 202 11 Page 64 of 64
14. user to set the static IP address Net Mask Gateway Name Server and Port The setup screens for this option are as follows ERM 202 User Guide Use the UP DOWN arrow keys A V to move between static IP setup parameter options when the cursor is on the setup parameter index a f Press the gt key to move to setup for the currently selected parameter Use the LEFT RIGHT arrow keys lt P to move the cursor position and the UP DOWN keys A V to increment the active digit The ENTER key returns the cursor to the index selection position When all of the static IP parameters are set select YES on the Update Parameters screen index f and press the ENTER key to apply the setting The front panel display will show When the update is finished automatic measurement will resume and the display will return to the function menu screen ERM 202 2 or the default measurement screen ERM 202 1 If NO is selected on the Update Parameters screen the display will return to the function menu screen without updating the parameters ERM 202 2 or to screen a static IP address setup ERM 202 1 The default port setting is 23 In most cases this does not need to be changed ERM 202 User Guide ERM 202 User Guide 3 5 Troubleshooting The performance of the ERM 202 can be tested using light sources and or components with known characteristics P wN Front Panel The accuracy of the measured ER will dec
15. ER is pressed the polarizer will rotate one angle step from the current position and the new measurement parameters will be displayed The optical power will be automatically scaled to display in mW or pW Once in manual mode the MANUAL button can be used to change the rotation step size without reinitializing the measurement Pressing the ENTER key after the step size is changed will then cause the polarizer to rotate by the new step size from the current position 3 4 Additional Features This section describes functions for external ER monitoring data storage recall and operational parameter setup Analog Monitor Voltage The ERM 202 has analog monitor voltage outputs for all channels from the SR30 4 pin connector on the rear panel General Photonics provides a conversion cable to BNC connectors Channel 2 Analog output signal GND Ch2 O GND Ch1 Channel 1 Analog output signal Figure 7 Analog output connector pinout left SR30 to BNC connection cable right ERM 202 User Guide One polarizer rotation cycle V min time The monitor voltage scales with the log of the measured power after the polarizer The PER can therefore be calculated from the difference between the maximum and minimum voltages measured over one polarizer rotation cycle This voltage difference is linearly related to the measured PER in dB by the following equation ER AV s where AV Vmax Vmin measured over one pola
16. M 202 to the control computer GND Figure 8 RS 232 connector pin assignment on ERM 202 rear panel 2 Power on the instrument 3 Send a command string to the ERM 202 See Table 1 and Table 2 for commands Any program that supports RS 232 communication protocols can be used to send ASCII commands to the instrument Many programming languages support serial communications including Visual Basic LabView and C RS 232 settings RS 232 port uses asynchronous framing 8 data bits no parity bit and 1 stop bit RS 232 baud rate 9600 bps Only one command is allowed in each command string ERM 202 User Guide ERM 202 User Guide Appendix 3 0 USB connection and setup USB drivers are included in the VCP folder on the cd They need to be installed before USB communication can be established The first time the USB is used insert the cd into the control computer Connect the ERM 202 to the control computer using a standard USB cable Power on the ERM 202 USB Driver Installation The first time the computer detects a USB connection to the instrument the driver may install automatically Windows 7 or 8 or a Found New Hardware Wizard window may appear Windows XP If neither of these things occur the driver can be located and installed using Device Manager 1 Open Device Manager Look for FT245R USB FIFO under Other Devices Right click it and select Update Driver Software File Actio
17. Making Light Work Lighter I Ganaral Phatnnire uw wNERW E UN NH TBEW UWG ww BH cor pg 9 mr a t 00 m ERM 202 Single or Dual Channel Polarization Extinction Ratio Measurement System User Guide Version 1 1 Date May 21 2015 ERM 202 User Guide General Photonics Incorporated is located in Chino California For more information visit the company s website at www generalphotonics com or call 909 590 5473 ERM 202 User Guide SAFETY CONSIDERATIONS The following safety precautions must be observed during operation of this product Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design manufacture and intended use of the product General Photonics assumes no liability for customers failure to comply with these requirements Before operation the user should inspect the product and review the manual carefully Properly ground the chassis and work space using the chassis ground terminal Use only in a safe work environment in terms of temperature humidity electrical power and risk of fire or shock The product is designed for indoor use Avoid exposure to liquids or water condensation Provide adequate ventilation for cooling Operate the product on a stable surface Avoid excess vibration Standard laser safety procedures should be followed during operation Never look into the light source fiber connector when the light source is turne
18. Rmax ERmin ER Pwr Ang 1 3 ER DOP ER Max Min 2 4 PR PWR ANG REF DOP 3 Else Enn see Table 3 for error codes Manual 4 ADR Query instrument GPIB address Value ADR xx for GPIB address xx stored in non volatile memory Else Enn see Table 3 for error codes Range 1 30 ADR nn Set the GPIB address to nn E00 if successful Range 1 30 Else Enn see Table 3 for error codes STP Stop polarizer rotation E00 if successful Else Enn see Table 3 for error codes STT Used after a STP command E00 if successful Resume a stopped measurement in the mode the instrument was in before the STP command was executed Else Enn see Table 3 for error codes ERM 202 User Guide SPD n Set polarizer rotation speed There are five Example SPD 0 4 options for the time needed for 1 full Response E00 if successful polarizer rotation cycle Else Enn see Table 3 for error codes 0 1 0 2 0 4 1 0 10s Default setting is 0 4s cycle SPD Query the current polarizer speed setting Example SPD 0 2 Range 0 1s to 10s see SPD n Current setting is option 0 2s cycle IND ON Enable disable inclusion of parameter Example When indicators are ON IND OFF labels in responses to data queries response to a wavelength query is Default value ON WAV 1550 When OFF response is 1550 TYP sss Set the connector type Example TYP APC to set Connector options are measurement fo
19. To change selectable operation settings see items under the FUNCTIONS menu as well as the SPEED and CYCLE settings for ERM 202 1 ERM 202 User Guide ERM 202 User Guide 3 3 Measurement Modes The ERM 202 has four measurement modes as well as store recall and setup functions In all measurement modes a dual channel ER meter displays the measured PER for channels 1 and 2 on the left side of the screen Depending on the selected mode the right side of the screen displays the measured power for each channel this is the default mode the power ratio between channels 1 and 2 the angle of the major axis of the polarization ellipse relative to a reference angle for each channel or the estimated DOP for channels 1 and 2 The ENTER key is used to cycle through the available measurement modes PER Power The default operation mode for the ERM 202 is automatic measurement When the instrument is turned on it executes an initialization process and then measures and displays the real time polarization extinction ratio ER in units of dB and optical power PWR in units of mW or HW using the default measurement speed of 0 4s cycle The single channel version also displays the polarization angle 0 in degrees relative to the reference angle Or The default reference angle 0 00 corresponds to the vertical direction Both 8 and Or are in the 90 to 4 90 range ERM 202 2 ERM 202 1 The STOP or STOP 1 and STOP 2 buttons stop the me
20. age eee eee esee nn enne nn enne nnne nnn nnn 19 Data Storage and Recall eese eere nnne enne nnn nnns 20 Setup Parameters Ia 21 3 5 Troubleshooting un 29 BE ii a a VR GR 29 Remote Control uuuruuunnunnnnnnunnunnunnnnnunnunnunnunnunnunnunnunnunnunnunnnnn nun 29 Section 4 0 Specifications BERR RRR RRR RRR RRR RRR RR RRR RRR RRR Ree 31 Optical in a a a we 31 Electrical E TE LIS 31 Physical and Environmental e esee esee enne enne nnn 31 ERM 202 User Guide Abpendices Aaaa 33 Appendix 1 0 Remote Control Commands 33 Command Lists iis sess ces stone nine can QU ER ZUEN MEAS OE NER KE MERE CV ERR RN S 33 Appendix 2 0 RS 232 connection and setup 39 Appendix 3 0 USB connection and setup ees 41 USB Driver Installation 5 2 oou 1000 100 u anna nu RE noy rre 41 Appendix 4 0 Ethernet setup zansannannonnannannunnannunnannannannannannnn 47 Front Panel cene cc cce ects cE ar D re ur Es na 48 LabView program eere eene nennen nnn un nun nun unu nun n nnn nnn 48 Appendix 5 0 GPIB setup and control ene 52 GPIB control nuuunuannannnnnnnnunnunnunnunnnunnunnunnunnunnunnunnunnunnunnunnunnnnnen 52 Appendix 6 0 LabView control program eene 53 RS 232 USB GPIB ai 53 Ethernet AAA
21. ameters Pressing the FUNC key brings up a set of menus ERM 202 2 ERM 202 1 Use the UP DOWN A V arrow keys to move between menu options and the ENTER key to select the one indicated by the hand pointer Up and down arrows on the right side of the display screen indicate whether additional menu options can be accessed by scrolling up or down Most of these parameter settings are written to memory and retained after power down GPI B Address To change the GPIB address press the FUNC key and select 1 GPIB Address Use the UP DOWN arrow keys A V to change the address The address range is 1 to 30 Press ENTER to save the setting Wavelength The ER meter is calibrated at two typical wavelengths For the 1260 1620nm version these are 1310 nm and 1550 nm calibration at other wavelengths is available EE ERM 202 User Guide To change the calibrated wavelength setting press the FUNC key and select 2 Wavelength ERM 202 2 ERM 202 1 ERM 202 2 Use the LEFT RIGHT arrow keys lt b to move between channel selection and wavelength selection for a particular channel the wavelength will be underlined Use the UP DOWN arrow keys A V to select a channel or change the wavelength ERM 202 1 Use the UP DOWN arrow keys A V to change the wavelength Press ENTER to execute the new settings The instrument will begin measurement using the new wavelength settings Connector type The ER meter can accept
22. asurement The ER meter s factory default standby timer setting is oo no standby To change it press the FUNC button and select Standby Time The standby time can be set to 5 ERM 202 2 only 10 15 20 25 30 and o minutes Press the ENTER key to restart automatic measurement with the new standby time setting For continuous operation the user can disable the standby function by setting the standby time to oo However leaving the ER meter running when it is not in use is not recommended Rotation cycles The ER meter averages over a designated number of polarizer rotation cycles to generate each set of data The default setting is 1 cycle no averaging ERM 202 2 Press the FUNC button and select 6 Average Cycles ERM 202 1 Press the CYCLE button ERM 202 User Guide Use the up and down arrow keys to set the number of cycles The range is 1 to 10 cycles The ENTER key restarts automatic measurement using the new averaging setting Reference Angle To set the reference angles used for angle measurement press the FUNC button ERM 202 2 Select 7 Reference Angle1 to reset the reference angle for channel 1 or 8 Reference Angle2 to reset the reference angle for channel 2 ERM 202 1 Select 5 Reference Angle ERM 202 2 ERM 202 1 Use the LEFT RIGHT arrow keys lt P to change the active underlined digit and the UP DOWN keys AV to increment the active digit After ENTER
23. asurement processes for the corresponding channels The latest set of measured values will remain on the display If only one channel is subsequently started again only that channel s data will be updated Two Input Power Ratio Measurement ERM 202 2 only for PM coupler characterization Press the ENTER key once from the default measurement mode to bring up the Two Input Power Ratio function The left side of the screen continues to show the PER measurements for channels 1 and 2 while the right side of the screen shows the coupling ratio of the PM coupler under test on top and the power split ratio on the bottom ER ERM 202 User Guide Instantaneous ER value calculated from the maximum and minimum power measured in the last polarizer rotation cycle ER 10 log Pmax Pmin P1 P1 P2 Coupling ratio of PM coupler under test in Yo P1 P2 Power split ratio between channels 1 and 2 ER Maximum Minimum Search Mode ERM 202 1 only The ER meter s automatic measurement mode correctly characterizes the worst case ER of a DUT using a broadband source However if a narrow band laser source is used to measure the ER of PM fiber the instantaneous measured ER is not necessarily the worst case minimum ER To measure the ER of a PM fiber with a narrow band laser source the fiber can be either mechanically manipulated stretched bent or moved or temperature cycled Either method will cause variation in the instantaneou
24. atures LLL NNNM RN RL NN Fuse location Figure 6 shows the location of the fuse compartment under the power cord plug There are two fuses in the compartment the one in use and a spare The fuse further inside the compartment is active The one closer to the compartment opening is the spare Replace the fuse with one with the exact rating of the original The ERM 202 uses a 3A 250VAC fuse Figure 6 Fuse compartment ERM 202 User Guide ERM 202 User Guide Section 3 0 Operation nstructions 3 1 Unpacking Inspect ERM 202 for any physical damage due to shipping and transportation Contact carrier if any damage is found Check the packing list to see if any parts or accessories are missing Packing List Description ERM 202 Power cord RS 232 cable straight wired USB cable SR30 to BNC connection cable for analog outputs User guide o Software cd 3 2 Front Panel Operation 1 Connect power cord and plug it into wall receptacle Make sure the ground pin of the power cord is connected to earth ground 2 Connect the device under test DUT to the ERM 202 s input port s The FC adapter has a wide key slot on the top for flat PC connectors and a narrow key slot on the bottom for angled APC connectors Make sure the optical power level at the input connector is below 10 dBm 10 0 mW 3 Turn on the ER meter It will begin automatic measurement using the default or previously specified settings
25. both flat PC upper key slot and angle polished APC lower key slot optical connectors and is set for PC by default Press FUNC and select 3 Connector Type ERM 202 2 ERM 202 1 ERM 202 2 Use the LEFT RIGHT arrow keys lt P to move between channel selection and connector type selection for a particular channel the connector type will be underlined Use the UP DOWN arrow keys A V to select a channel or change the connector type ERM 202 1 Use the UP DOWN arrow keys A V to change the connector type Press the ENTER key to execute the new settings Measurement speed The default measurement speed is 0 4s per polarizer rotation cycle ERM 202 2 Press the FUNC button and select 4 Speed ERM 202 1 Press the SPEED button ERM 202 User Guide Use the up and down arrow keys to change measurement speeds The available measurement speeds are 0 1 0 2 0 4 and 1 s cycle A 10s cycle speed is also available on the ERM 202 1 The ENTER key applies the selected speed setting for both measurement channels and resumes automatic measurement The measurement speed setting is not saved after power down It will reset to 0 4s cycle the next time the ER meter is powered on Standby The ER meter will go into standby mode after a designated period with no user interaction The display will show Press one of the AUTO keys or send a START remote control command to exit standby and restart automatic me
26. cessful Else Enn see measurement Table 3 for error codes ss options EP PER amp PWR measurement EA PER amp Angle measurement ED PER amp DOP estimation EC PER coupling ratio and power split ratio MIN RST Initialize Minimum and Maximum values E00 if successful Else Enn see Table 3 for error codes CYC Query the number of polarizer rotation cycles Response Format CYC nn used for averaging for each measurement Example CYC 5 CYC nn Set the number of cycles used for averaging E00 if successful Else Enn see for each measurement Range for nn is 1 10 Table 3 for error codes Table 2 Command list ERM 202 1 System Commands Command Description Response IDN Queries the instrument product number IDN GP ERM 202S V1 4 SN 203210000242 Else Enn see Table 3 for error codes VER Queries the Firmware Version VER V1 4 S 20150420 Version Dependent RST Reset all operation parameters to default E00 if successful values Else Enn see Table 3 for error codes SAV nn Save the data currently shown on the front E00 if successful panel to location nn Else Enn see Table 3 for error codes Range for nn 00 to 99 Example SAV 9 save to location 9 RCL nn Recalls the data from storage location nn Example RCL 9 Recall data from and displays it on the front panel location 9 Range for nn 00 to 99 Response Formats Response begins with display mode label 1 ER PWR ANG REF Display Mode Mode 2 ER E
27. d DHCP server PC ERM 202 Switch PC ERM 202 Figure 9 Direct connection ERM 202 to PC Figure 10 connect ERM 202 with DHCP server Once the physical connections are established there are two ways to set up the ERM 202 s Ethernet configuration ERM 202 User Guide Front Panel Press the FUNC key and select Get Dynamic IP to set the ERM 202 for dynamic IP addressing and reguest a dynamic IP address from the server or select Static IP to set the static IP parameters See section 3 4 for details LabView program A LabView program provided with the instrument can also be used to guery the IP address and perform static IP setup Open the LabVIEW program SET ETHERNET exe to set the Ethernet configuration This program was designed for an RS 232 interface so the instrument should be connected to the computer via RS 232 before running it Please see the instructions in Appendix 2 for RS 232 setup The program interface is shown below Select the correct serial RS 232 port from the port configuration box at the top of the screen The baud rate should be set to 9600 Once these two parameters are set click the white arrow to run the program The program has 3 tabs The first GET IP CONFIG is used to query the current IP configuration of the ERM 202 When the Get IP Config button at the left of the screen is clicked the program will read back the instrument s current IP address net mask gateway nameserver and p
28. d from the maximum and minimum power reading from the last polarizer rotation cycle ER 10 log Pmax Pmin 8 Polarizer angle corresponding to the maximum power reading from the last polarizer rotation cycle measured relative to the reference angle The default reference angle is 0 defined as the vertical direction Polarization angle 0 and reference angle Br are measured in degrees and will always be between 90 and 90 See FUNCTIONS section for information on setting the reference angle to a value other than 0 DOP Estimation Mode For partially polarized light the DOP can be estimated from the ER measurement using the following formula ER cp EM DOP Pii Pris 10 1 ER max Pain 10 10 1 where ERmax is the maximum ER value achievable by stretching bending moving the fiber or by temperature cycling the fiber Temperature cycling is the preferred method Press ENTER once from the angle measurement mode ERM 202 2 or the ER max min search mode ERM 202 1 to begin the DOP estimation function The display will show ERM 202 User Guide ER ERM 202 2 ERM 202 1 Instantaneous ER value calculated from the maximum and minimum power reading from the last polarizer rotation cycle ER 10 log Pmax Pmin DOP Estimated DOP calculated from DOP 10 19 1 107 94 1 100 Press ENTER once from DOP estimation mode to return the ER meter to the default automatic measurement mode Manual P
29. d on THE OUTPUT LIGHT FROM A HIGH POWER LASER IS HARMFUL TO HUMAN EYES Follow industry standard procedures when operating a high power laser source ERM 202 User Guide ERM 202 User Guide Section 1 0 Overview enne aer RARNERARRRESERERERENRE 7 1 1 Principle of Operation sin sect nes AUWA KAKA den andere 7 Section 2 0 FeatureS ussussuszuszuzuwa D 2 1 Front Panel and Optical Inputs eene 9 2 2 Rear Panel Electrical and Remote Control I nterfaces 11 Section 3 0 Operation Instructions e eene 13 3 1 Unpacking ssssssocsssssssssscsscassssonsennosesssssncesesnrassssessesssssensessss 13 3 2 Front Panel Operation sssscssusonocconnacancunsencncennaneseueuneuucen 13 3 3 Measurement Modes 1 5u22saxu ssa nn nn nn nn 15 PER Power III 15 Two Input Power Ratio Measurement ERM 202 2 only 15 for PM coupler characterization eee esee enne nnn 15 ER Maximum Minimum Search Mode ERM 202 1 only 16 Angle Measurement Mode ERM 202 2 only 17 DOP Estimation Mode cer eeere enne n nne u nne u nna ununi n nun 17 Manual Polarizer Control Mode ERM 202 1 only 18 3 4 Additional Features 5 52525222 sassun i pRRRERRRRRRSRRRSRRERSRREERAEREAR ERAS 19 Analog Monitor Volt
30. des user interaction Measurement data queries and optical parameter setting Command Description Response POW 1 Query measured optical power Example POW 1 1 35451mw POW 2 Response includes units mW HW etc Else Enn see Table 3 for error codes If this command is sent from a mode other than auto measurement mode the ER meter will go into auto mode PER 1 Query PER of channel 1 or 2 respectively Response Example PER1 15 817 PER 2 Result given in dB Else Enn see Table 3 for error codes ANG 1 Query the measured polarization angle of Response Example ANG1 2 50 ANG 2 channel 1 or channel 2 respectively Else Enn see Table 3 for error codes relative to the reference angle Result given in degrees REF 1 snn nn Set the reference angle of channel 1 or 2 Example REF 27 56 REF 2 snn nn 90 00 lt angle lt 90 00 Response E00 if successful s indicates or sign Else Enn see Table 3 for error codes sign is optional for positive angles REF 1 Query the reference angle of channel 1 or 2 Response Example REF 1 27 56 REF 2 90 00 lt angle lt 90 00 Else Enn see Table 3 for error codes CPR Queries the coupling ratio defined as Response format CPR ff f P1 P1 P2 100 where P1 and P2 are the Example CPR 15 9 input powers of channels 1 and 2 Chi coupling ratio is 15 9 respectively PSR Queries the power split ratio defined as Example PSR 9 0 P1 P2 where P1 and P2 are t
31. dress is 17 for example the user can set the IP address for the ERM 202 to any number in the range 1 254 except 17 For static IP control make sure that the control computer is also set to use a static defined IP address check the TCP IP properties to find the computer s Ethernet setup information For dynamic IP control make sure that the control computer is set to obtain its IP address automatically This information is also under TCP IP properties e To connect the instrument directly to a PC use a PC to PC cable To connect the instrument to a LAN use a standard network cable e For Ethernet control the serial port is only used during Ethernet setup if using the LabView Ethernet setup program ERM 202 User Guide Appendix 5 0 GPI B setup and control To change the GPIB address press the FUNC button and select 1 GPIB Address Use the UP DOWN arrow keys A V to change the address Range 1 30 Press ENTER to save the setting GPI B control Connect the instrument to the computer with a GPIB cable After determining setting the ERM 202 s GPIB address select the corresponding port number in the corresponding box of the LabView control program see Appendix 6 and run the control program In addition to using the provided control programs individual commands can be sent through the GPIB port Enter the GPIB address in the communication program being used The instrument will then be ready to receive commands The com
32. e Port Configuration com 19600 Note RS 232 baud rate must be 9600bps GET IP CONFIG MODE SETTING STATIC IP SETTING Select DYNAMIC Mode 9 ETHERNET MODE Select STATIC Mode e DYNAMIC STOP Program Ethernet mode selection screen dynamic ERM 202 User Guide Pananal Dhatan re GP ETHERNET SETUP Setlist WI a NULUNIUJ Serial Port Baud Rate Port Configuration cons 9600 Note RS 232 baud rate must be 9600bps GET IP CONFIG MODE SETTING STATIC IP SETTING Select DYNAMIC Mode ok ETHERNET MODE Select STATIC Mode ok 3 STATIC STOP Program Ethernet mode selection screen static Clicking the OK button for dynamic mode puts the ERM 202 into dynamic IP mode The instrument will obtain the dynamic IP information from the server When it is finished the indicator for dynamic mode will turn green and the Ethernet Mode status box will say DYNAMIC Clicking the OK button for static mode puts the ERM 202 into static IP mode The instrument will recall the static IP settings from its memory These can then be used for communication When it is finished the indicator for static mode will turn green and the Ethernet Mode status box will say STATIC The ERM 202 writes its most recently saved static IP settings and its active mode to memory If it is powered off while in static mode when it is powered back on it will be in static mode and the most
33. ement status control AUTO Begins automatic PER measurement default setting CYCLE Set the number of polarizer rotation cycles for averaging default value is 1 cycle MANUAL Manual polarizer rotation control STOP Stops measurement STORE Store currently displayed measurement values RECALL Recall stored measurement values SPEED Set scanning time for one polarizer rotation cycle default is 0 4s FUNC Accesses operation parameter setup ENTER Enters measurement parameters set with arrow keys accesses alternate operation modes returns the ER meter to front panel control from remote control A lt gt Select and set measurement parameters v ERM 202 User Guide 2 2 Rear Panel Electrical and Remote Control nterfaces The AC power plug fuse and communication interface connectors are mounted on the rear panel as shown in Figure 5 The ERM 202 includes RS 232 USB Ethernet and GPIB interfaces for external computer operation of the system LabView National Instruments www ni com control programs are provided Control commands USB driver installation instructions and instructions for running control programs are located in the appendices uwEvoTaGE GENERAL PHOTONICS CORP CHINO CA USA pm feo EX fa i t Line CAUTION DO NOT REMOVE COVER DISCONNECT POWER BEFORE REPLACING FUSE SERVICE BY QUALIFIED PERSONNEL ONLY Figure 5 ER meter rear panel Rear Panel Fe
34. ent also yields the direction of polarization of the light The angle of polarization is defined as the angle of the polarizer s transmission axis at maximum output optical power relative to some reference direction For example for the case of a linearly polarized light source most of the light will be polarized along the principal axis of polarization with very little power in the orthogonal component The PER can be gt 40dB i e the power ratio between the two orthogonal polarizations is gt 10 By contrast in an ASE light source the linearity of the polarization is poor due to broadband spontaneous emission Its PER will be close to OdB indicating that the optical power is distributed approximately equally in all polarization angles ERM 202 User Guide Section 2 0 Features 2 1 Front Panel and Optical I nputs The front panel of the ER meter is shown in Figure 3 and Figure 4 It contains the power switch Power organic light emitting diode display OLED push button control pads and optical input port s The input ports are free space so they can accept either flat or angle polished input fiber connectors see function menu for connector type selection For the standard 1260 1620nm ER meter input power should be between 30 and 10 dBm If the input power is too low the screen will display Optical Power Low External fiber connectors should be cleaned using industry standard cleaning methods before connectio
35. ger USB Serial Port should now appear under Other Devices Right click it and select Update Driver Software Follow the same procedure as described above to specify the driver location and install the driver until the completion window for the USB serial port appears ERM 202 User Guide TALEU O a t 9 4 CLl Update Driver Software USB Serial Port COM mn ee Windows has successfully updated your driver software Windows has finished installing the driver software for this device USB Serial Port 7 In Device Manager there should now be a USB Serial Port listed under Ports COM amp LPT ERM 202 User Guide File Action View Help 3 270 u Computer Management Local 4 System Tools gt Task Scheduler gt FH Event Viewer gt amp Shared Folders b Local Users and Groups gt 9 Performance Device Manager 4 E Storage Disk Management b B Services and Applications gt Disk drives amp Display adapters b DVD CD ROM drives gt c IDE ATA ATAPI controllers b 25 Imaging devices pem Keyboards gt E Mice and other pointing devices ME Monitors i Network adapters Xj Bluetooth Device Personal Area Network Bluetooth Device RFCOMM Protocol TDI amp Intel R Centrino R Wireless N 1030 Microsoft Virtual WiFi Miniport Adapter Microsoft Virtual WiFi Miniport Adapter 2 amp Realtek PCIe FE Family Controller Po
36. h is complete the indicator dot at the right of the screen will turn green and the pull down menu on the left will display all available ports Select a communication port from the list Ei arr VEA ERM 202 Dual Channels Lananal Dhninnine_ SOS SRI ES Polarization Extinction Ratio Meter Ver 1 2 Setup Measurement Recall Function Setup Long Term NEL IA 9 i L a ASRLX INSTR is the same as COMX for RS 232 b GPIB XX INSTR refers to the GPIB port with an address of XX ERM 202 User Guide Ethernet The control programs ERM 202S D InstrumentMain Ethernet exe executable are for use with the Ethernet interface Open the control program and click either the white arrow at the top of the page or the Start Program button to run it Enter the instrument s IP address and port number and click Connect to establish the connection If the connection is successful the connection status indicator dot will turn green and the instrument product number will be displayed in the bottom text box ERM 202 Dual Channels Ranaral Dhatanine izati incti i Abiit UI 1 HULUHIUI Polarization Extinction Ratio Meter Ver 1 2 Measurement Port Configuration Input IP Address Successful 0 10 D ggg J Connect 9 IDN GP ERM 202D V1 4 SN 203210000268 Connection successful ERM 202D InstrumentMain Ethernet vi ERM 202 Dual Channels Pananal
37. he input powers of channels 1 and 2 respectively DOP 1 Query the estimated DOP value of channel 1 Response format DOP 1 99 95 DOP 2 or 2 respectively ER meter must be in DOP Else Enn see Table 3 for error codes estimation mode to respond correctly WAV 1 Query operation wavelength setting of Response example WAV 1 1550 WAV 2 channel 1 or 2 in nm or WAV 2 1310 WAV 1 nnnn Set operation wavelength nm Example WAV 1 1550s WAV 2 nnnn Options 1550 and 1310 ONLY for standard Response E00 if successful configuration ERM 202 other wavelengths Else Enn see Table 3 for error codes can be specially requested when ordering Note When sending a data query command make sure that the ER meter is in the corresponding measurement mode For example it should be in DOP estimation mode code ED before the DOP Command is sent ERM 202 User Guide Operation Mode Commands Command Description Response MOD Query the measurement mode Responses listed at left Possible responses are Else Enn see Table 3 for error MOD EP PER and optical power codes measurement MOD EA PER and polarization angle measurement MOD ED PER amp DOP estimation MOD EC PER coupling ratio and power split ratio between inputs of the two channels MOD FN Display Other Function MOD RE Recall mode MOD ss Set the measurement mode to ss and start E00 if suc
38. is pressed automatic measurement will resume and the display will show the measurement results with 9 measured relative to the new reference angle Reference angle range is 90 The default value is 0 which corresponds to a vertical polarizer orientation aligned with the connector keys Ethernet IP address The instrument s IP address must be known in order to control it via Ethernet See Appendix for Ethernet setup details To set the Ethernet IP address press the FUNC button and select Get Dynamic IP or Static IP Dynamic IP Selecting Get Dynamic IP requests a dynamic IP address from the server ERM 202 User Guide If the instrument is able to establish communication with the DHCP server and successfully retrieve an IP address the address will be displayed on screen If the instrument is unable to connect to the server it may display 0 0 0 0 In this case check the connection Each time this menu option is selected the instrument requests a dynamic IP address from the server If this menu option is selected while the instrument is already in communication using a dynamic IP address the instrument may be assigned a dynamic IP address other than the one it is currently using This may interrupt communication and the address may not be displayed correctly on the front panel Static IP Selecting Static IP sets the instrument for Ethernet communication using static IP addressing and allows the
39. it should be in DOP estimation mode code ED before the DOP Command is sent Operation Mode Commands Command Description Response MOD Query the measurement mode Responses listed at left Possible responses are Else Enn see Table 3 for error MOD EP PER PWR amp Angle measurement codes MOD EM Max Min PER measurement MOD ED PER amp DOP estimation MOD MS Manual mode MOD FN Display Other Function MOD ss Set the measurement mode to ss and start E00 if successful Else Enn see measurement Table 3 for error codes ss options EP PER PWR amp Angle measurement EM Max Min PER measurement ED PER amp DOP estimation MS Manual mode MIN RST Initialize Minimum and Maximum values E00 if successful Else Enn See Else Enn see Table 3 for error codes CYC Query the number of polarizer rotation cycles Response Format CYC nn used for averaging for each measurement Example CYC 5 CYC nn Set the number of cycles used for averaging E00 if successful Else Enn see for each measurement Range for nn is 1 10 Table 3 for error codes MAN ZEO Initialize Manual mode Takes a minimum E00 if successful power measurement to be used for Else Enn see Table 3 for error calculating power ratio during manual codes measurement then rotates the polarizer to the O vertical position MAN STE Query the angle step size setting in manual
40. mand list is given in Table 1 and Table 2 in Appendix 1 To ensure proper communication use a GPIB cable that is fully compatible with the IEEE 488 1 standard All GPIB IEEE 488 interface connections must be made before turning on the instruments ERM 202 User Guide Appendix 6 0 LabView control program LabView control programs are provided for remote control of the ERM 202 If LabVIEW is not installed on the control computer install the LabVIEW Run Time engine LV2012SP1 Run time engine and the VISA driver NIVISA1401runtime These run time engines are compatible with Windows 8 7 XP For USB control the USB drivers need to be installed See Appendices 2 5 for details on setup for specific communication interfaces Always close the control program before turning off the instrument RS 232 USB GPI B The control programs ERM 202S D InstrumentMain VISA exe executable are compatible with RS 232 USB and GPIB interfaces These programs will auto sense which interface is being used and display the appropriate port configuration option The control program interface is otherwise identical for RS 232 USB and GPIB control Open the ERM 202S D InstrumentMain VISA program It will show the long term measurement screen Run the program by clicking the white arrow at the top of the page or the Start Program button at the bottom of the page The program will jump to the Setup tab and start searching for available ports After the searc
41. n View Help l nt H Computer Management Local a g JFANG Sales Actions 4 System Tools gt Batteries Deuce M b Task Scheduler gt Bluetooth Radios gt fl Event Viewer gt 4 Computer More Actions gt Shared Folders gt cg Disk drives b Local Users and Groups p A Display adapters b Performance gt DVD CD ROM drives 2 Device Manager b lt q IDE ATA ATAPI controllers 4 e Storage gt JM Imaging devices fe Disk Management gt lt 2 Keyboards b B Services and Applications p A Mice and other pointing devices M Monitors 4 Network adapters Lr Bluetooth Device Personal Area Network La Bluetooth Device RFCOMM Protocol TDI Intel R Centrino R Wireless N 1030 N Realtek PCIe FE Family Controller er devices N FT245R USB FIFO gt D Processors b Sound video and game controllers gt EM System devices D Universal Serial Bus controllers ERM 202 User Guide I Update Driver Software Disable Uninstall Scan for hardware changes Properties AG 2 Update Driver Software USE Seal Port How do you want to search for driver software Search automatically for updated driver software Windows will search your computer and the Internet for the latest driver software for your device unless you ve disabled this feature in your device installation settings i Browse my computer for driver software Locate and install driver software manually 2
42. n to the ERM 202 Dirty connectors can affect measurement accuracy nanii J SISSE cu ERM 202 oua Channel Ferrers d Polarization Exbnction Ratio Meter 00 AUTON AUTO2 STORE LOCAL INPUT 1 INPUT 2 STOP1 STOP2 RECALL e C Figure 3 Dual Channel ER meter front panel fAFOWERIS Front panel features OLED display displays data and operation mode information Power power on off switch Input adapter for optical fiber input Keypad push buttons for measurement status control AUTO1 Begins automatic PER measurement for channel 1 AUTO2 Begins automatic PER measurement for channel 2 STOP 1 Stops measurement for channel 1 STOP 2 Stops measurement for channel 2 STORE Store currently displayed measurement values RECALL Recall stored measurement values LOCAL Returns the ER meter to front panel control from remote control FUNC Accesses operation parameter setup ERM 202 User Guide ENTER Enters measurement parameters set with arrow keys accesses alternate operation modes A lt gt Select and set measurement parameters v ERM 202 Single Channel Sene Potonics Polarization Exbnction Ratio Meter 06 AUTO CYCLE MANUAL STOP INPUT ee wer mm C Figure 4 Single Channel ER meter front panel POWER Front panel features OLED display displays data and operation mode information Power power on off switch Input adapter for optical fiber input Keypad push buttons for measur
43. olarizer Control Mode ERM 202 1 only This function is used for manual alignment control The polarizer rotation angle is manually controlled from the front panel with the power ratio measured at each step Please note that the angle display in manual mode is for estimation purposes only and should not be taken as a precise angle measurement To enter manual control mode press the MANUAL button The minimum angle step size is 0 069 Use the arrow keys to set the step size for the rotation angle by changing the multiplier The left and right arrows change the active underlined digit and the up and down keys increment the active digit The step size range is 0 06 to 90 multiplier range is 1 to 1500 After setting the step size press the ENTER key to execute the selection The first time this is done after entering manual mode the ER meter goes through an initialization step a minimum power measurement is taken then the polarizer is rotated to the vertical position 0 if Or is 09 and the display shows the manual measurement display screen ERM 202 User Guide In manual measurement mode 0 is the current polarizer angle measured relative to reference value Or P is the measured power at the current polarizer angle and PR is the power ratio in dB between the measured power at the current polarizer angle and the minimum power measured during the manual mode initialization step From this point each time ENT
44. ompletes the first part of the installation during which the USB to serial converter is installed The second part consists of the installation of the serial port driver ERM 202 User Guide File Action View Help e 91253 BO Computer Management Local JFANG Sales 4 System Tools gt 3p Batteries b Task Scheduler gt Q Bluetooth Radios gt 8l Event Viewer gt gli Computer More Actions gt Shared Folders gt yey Disk drives gt Local Users and Groups mn Display adapters b Performance m DVD CD ROM drives Device Manager gt lt q IDE ATA ATAPI controllers 4 amp Storage 25 Imaging devices Disk Management pem Keyboards b E Services and Applications b Ex Mice and other pointing devices gt M Monitors a Network adapters i 23 Bluetooth Device Personal Area Network EP Bluetooth Device RFCOMM Protocol TDI Intel R Centrino R Wireless N 1030 Microsoft Virtual WiFi Miniport Adapter Microsoft Virtual WiFi Miniport Adapter 2 Realtek PCIe FE Family Controller TE USB gt ND Processors gt E Sound video and game controllers gt 4 System devices 4 3 Universal Serial Bus controllers 8 Generic USB Hub Generic USB Hub Intel R 6 Series C200 Series Chipset Family USB Enhanced Host Cc Intel R 6 Series C200 Series Chipset Family USB Enhanced Host Cc Renesas Electronics USB 3 0 Host Controller e Renesas Electronics USB 3 0 Root Hub 6 In Device Mana
45. or sign sign is optional for positive angles Example REF 27 56 Response EO00 if successful Else Enn see Table 3 for error codes REF Query the reference angle Response Example REF 27 56 90 00 angle 90 00 Else Enn see Table 3 for error codes PER MAX Query the maximum ER value recorded within Response Example the current measurement period ER meter PER MAX 5 81 must be in maximum minimum search mode Else Enn see Table 3 for error to respond to this command codes PER MIN Query the minimum ER value recorded within Response Example the current measurement period ER meter PER MIN 1 812 must be in maximum minimum search mode Else Enn see Table 3 for error to respond to this command codes DOP Query the estimated DOP value of the light Response format DOP 99 9 source under test ER meter must be in DOP Else Enn see Table 3 for error estimation mode to respond correctly codes WAV Query operation wavelength setting in nm Response example WAV 1550 WAV nnnn Set operation wavelength nm Example WAV 1550 Options 1550 and 1310 ONLY for standard configuration ERM 202 other wavelengths can be specially requested when ordering Response E00 if successful Else Enn see Table 3 for error codes ERM 202 User Guide Note When sending a data query command make sure that the ER meter is in the corresponding measurement mode For example
46. ort as well as whether the instrument is currently set for static or dynamic IP addressing Pananal Dhatanire gt GP ETHERNET SETUP JOHO WI 1 Hays lu Serial Port Baud Rate Port Configuration cons 9600 Note RS 232 baud rate must be 9600bps GET IP CONFIG MODE SETTING STATIC IP SETTING Click the button to get IPCONFIG Get IP Address 192 168 2 106 Get IP Config ETHERNET MODE Get Net Mask 255 255 255 0 Get Gateway STATIC 192 168 2 1 Get Nameserver 192 168 2 2 Get Port 23 STOP Program IP Config query screen Static IP mode result ERM 202 User Guide Pananal Dhatanire b GP ETHERNET SETUP WLIIVI WI 9 MVE Serial Port Baud Rate Port Configuration cons 18600 Note RS 232 baud rate must be 9600bps GET IP CONFIG MODE SETTING STATIC IP SETTING Click the button to get IPCONFIG Get IP Address 192 168 2 110 Get IP Config ETHERNET MODE Get Net Mask 255 255 255 0 ne f DYNAMIC Get Gateway pee j etGateway NEN Get Nameserver 192 168 2 2 Get Port 23 STOP Program IP Config query screen Dynamic I P mode result Use this function to obtain the IP address which is needed to control the ERM 202 via Ethernet The second tab MODE SETTING allows the user to switch the ERM 202 between static and dynamic IP addressing modes Pananal Dhatanire 3 GP ETHERNET SETUP Sei WI a NULUNIUJ Serial Port Baud Rat
47. put cycle number j 1 Input manual mode step size 210 Step Size The Manual Mode screen displays the following data PR The power ratio in dB between the measured power at the current polarizer angle and the minimum power measured during the manual mode initialization step POW Measured power in mW or HW ANG Current polarizer angle relative to reference angle in degrees REF Reference angle in degrees To reinitialize manual measurement take a new minimum power measurement to calculate the power ratio and reset the polarizer angle to vertical exit manual mode by selecting some other measurement mode from the pull down menu and clicking Set then re select manual mode and click Set ERM 202 User Guide The remaining tabs access functions to recall stored data set control parameters and perform a long term measurement Recall f ERM 202D InstrumentMain VISA vi ERM 202 Dual Channels Senora Dhotanec Polarization Extinction Ratio Meter Ver 1 2 StartiD 91 EndID 912 9 Pow1 0 66420mw Pow2 0 85133mw ER1 10 96 Powl 0 65524mw Pow2 0 83176mw ER1 12 55 Pow1 0 63738mw Pow2 0 81733mw ER1 10 52 P1 P1 P2 43 89 P1 P2 0 78 P1 01 02 4405 ER1 12 21 P1 P1 P2 43 97 P1 P2 0 78 ER1 11 06 DOP1 85 46 DOP2 87 14 ER1 11 17 DOP1 85 81 DOP2 95 37 DOP1 85 47 ER2 17 46 DOP2 96 47 ER1 11 02 ANG1 81 35 ER2 17 36 ANG2 76 40 ER1 14 30 ANGI 78 79 ANG2 82 30 ER1
48. r APC connector APC Angled Physical Contact connector Response E00 if successful or PC Physical Contact flat connector Else Enn see Table 3 for error codes TYP Query the connector type setting Response TYP APC or TYP PC Else Enn see Table 3 for error codes TIM nn Set the standby time period after which Example TIM 25 the ERM 202 goes into standby if there is no user interaction nn 10 15 20 25 30 min or 00 standby disabled TIM Query the set standby time period after Response Example TIM 25 which the ERM 202 goes into standby if Else Enn see Table 3 for error codes there is no user interaction Measurement data queries and optical parameter setting Command Description Response POW Query measured optical power Example POW 1 35451mw Response includes units mW uW etc Else Enn see Table 3 for error If this command is sent from a mode other codes than auto measurement mode the ER meter will go into auto mode PER Query PER in auto mode or power ratio in Response Example PER 15 81 manual mode Result given in dB Else Enn see Table 3 for error codes ANG Query the measured polarization angle in Response Example ANG 2 50 auto mode or the current polarizer rotation angle in manual mode relative to the reference angle Result given in degrees Else Enn see Table 3 for error codes REF snn nn Set the reference angle 90 00 lt angle lt 90 00 s indicates
49. rease if the input optical power is too low Large and or fast power fluctuations can render the ER reading unstable If the ER reading varies significantly check the stability of the optical source To ensure an accurate reading make sure that the ER meter is on a stable surface and does not move during measurement For standard automatic measurement use a broadband source A narrow band source can be used with the ER max min function of the ERM 202 1 Remote Control Command Format If the beginning or ending identifiers or of a command are missing the instrument will not respond Errors may occur during communication due to hardware control measurement interruptions The typical response from the instrument in this case is EO1 If this occurs the user should resend the command until the correct response is received Communication may occasionally freeze overflow due to port conflict more common during ETHERNET control In this case the user may need to restart the ERM 202 to re enable remote control RS 232 Make sure that the cable is straight wired pin to to pin wired not cross wired Verify active Comm Port COM1 COM2 etc Verify Comm Port settings 8 data bits 1 stop bit no parity bits Check baud rate 9600 bps by default ERM 202 User Guide ERM 202 User Guide Section 4 0 Specifications Optical Operating wavelength range 1260 1620 nm 960 1160nm Calibrated operating wavelength
50. recently saved set of IP configuration information can be used for communication If the ERM 202 is powered off while in dynamic IP mode when it is powered back on it will be in dynamic IP mode The third tab in the program STATIC IP SETTING allows the user to set the static IP configuration information Input the information into the corresponding boxes and click the SET button As each value is written its indicator turns green When all of the information is successfully stored the Set OK indicator will turn green ERM 202 User Guide Pananal Dhaka GP ETHERNET SETUP uu u HIVI WI a NYUNI Port Configuration cons 18600 Serial Port Baud Rate Note RS 232 baud rate must be 9600bps GET IP CONFIG MODE SETTING STATIC IP SETTING Set IP Address 192 168 2 106 9 Input all of the parameters then click Set to apply it Set Net Mask 255 255 255 0 e Set Gateway 192 168 2 1 e Set 3 Set Nameserver 192 168 2 2 2 Set OK Set Port 123 Static I P setup screen For static IP control the net mask and gateway for the instrument should be the same as those for the control computer The first 3 groups of numbers in the IP address should be the same as those for the control computer 192 168 2 for example The last number can be any available number but cannot be the same as the IP address of the control computer The range of numbers is 1 to 254 If the computer s IP ad
51. rizer rotation cycle S 0 04 is a scaling factor For example if AV 1 V and s 0 04 then ER 1 0 04 25 dB Data Storage and Recall Data storage Data from any automatic or manual measurement can be stored in the ER meter s memory To store current measurement results press STOP for all channels currently in operation to stop measurement then press STORE The data stored in each measurement mode is as follows ERM 202 2 DOP estimation mode ER1 DOP1 ER2 DOP2 ERM 202 User Guide ERM 202 1 Measurement mode Data stored Default auto mode ER power angle reference angle Max Min ER mode ER ER max ER min DOP estimation mode ER DOP Manual mode Power ratio power current polarizer angle reference angle Use the UP DOWN keys AY to select the desired storage location There are 100 storage locations 40 99 available The ENTER key stores the data to the selected storage The display will show location and restarts automatic measurement Data retrieval To retrieve stored data press RECALL The display will show Use the up and down arrow keys to select the desired storage location Pressing ENTER will display the data stored in that location If there is no information stored at the selected location the display will show a No Data message Press RECALL again to return to recall ID selection Setup Parameters The FUNC key allows the user to access and set various operational par
52. rtable Devices Ports CO Pm gt E Sound video and game controllers gt gli System devices 4 Universal Serial Bus controllers Generic USB Hub Generic USB Hub Intel R 6 Series C200 Series Chipset Family USB Enhanced Host Cc Intel R 6 Series C200 Series Chipset Family USB Enhanced Host Cc Renesas Electronics USB 3 0 Host Controller Renesas Electronics USB 3 0 Root Hub L L 8 USB Composite Device 8 L L USB Mass Storage Device USB Root Hub USB Root Hub 4 m Note the port number that the ERM 202 is using COM3 in this example The USB driver can drive more than one instrument but the instruments will be connected under different port numbers ERM 202 User Guide Appendix 4 0 Ethernet setup There are two connection configurations for Ethernet control a Static IP the administrator assigns the instrument a fixed IP address In this mode the instrument can be directly connected to the control PC as shown in Figure 9 or can be connected through a router For a direct connection as in Figure 9 a cross linked network cable must be used For a connection to a router a standard straight linked network cable would be used b Dynamic IP the DHCP server assigns the instrument an available address when requested Connect the instrument with a DHCP server running on router or exchange server as shown in Figure 10 For this configuration a standard straight linked network cable must be use
53. s 1310nm 1550nm 980nm 1064nm PER dynamic range gt 50 dB gt 40 dB PER ranges 0 50 dB input power 5 to 0 40 dB input power 0 to 10 dBm 10 dBm 0 30 dB input power 25 0 30 dB input power 20 to 5 dBm to 0 dBm Input optical power range 30 to 10 dBm 20 to 10 dBm Optical power resolution 0 02 dBm PER 30 0 2 dBm PER 30 Power measurement accuracy 0 5 dB Power resolution 0 02 dB PER lt 30 dB 0 2 dB PER gt 30 dB Optical power damage threshold 300 mW Measurement speed 0 1 0 2 0 4 1 sec cycle both versions 10s cycle manual control single channel onl Electrical Front panel display OLED graphic display Power Supply 100 240VAC 50 60 Hz Analog Output 0 5V max range monitor voltage scales with log of measured power after polarizer Range can be lt 5V Communication Interfaces RS 232 USB Ethernet GPIB Physical and Environmental Dimensions Standard 2U half 19 rack mount size 14 L x 8 5 W x 3 5 H Input Fiber Type PM or single mode fiber Weight Dual channel 6 25 Ib Single channel 6 Ib Operation temperature 0 to 40 C Storage Temperature 20 to 60 C Notes Specifications listed in table apply for operation at 23 5 C 1 Other wavelength ranges and connector types may be available ERM 202 User Guide Other calibrated wavelengths available upon reguest For measurement speeds 0 4s cycle or slower Rack mount kit available Contact General Photonic
54. s ER allowing the worst case value to be found Temperature cycling is the preferred method To facilitate this measurement the ERM 202 1 has a maximum minimum ER search function From auto mode press ENTER once to access the maximum minimum ER search function ER Instantaneous ER value calculated from the maximum and minimum power measured in the last polarizer rotation cycle ER 10 log Pmax Pmin Max Maximum ER value measured within the current measurement period Min Minimum ER value measured within the current measurement period The measurement period begins when the max min search mode is entered To perform an ER measurement using a narrow band source first connect the source PM fiber under test ER meter Put the ER meter into max min search mode and either stretch or heat cool the PM fiber The MIN value measured will be the worst case ER To reset the measurement period use the ENTER key to cycle through measurement modes back to max min mode ERM 202 User Guide Angle Measurement Mode ERM 202 2 only In the ERM 202 2 this mode displays the measured PER and polarization angle for channels 1 and 2 In the ERM 202 1 this function is included in the PER Power mode described earlier which displays PER polarization angle and power Press ENTER once from the two input power ratio measurement screen to begin the Angle Measurement function ER Instantaneous PER value calculate
55. s for details Free space adapter for FC connectors accepts either flat or angle polished fiber connectors TE IJ ERM 202 User Guide Appendices General Photonics provides a test program for remote control of the ERM 202 The control software is included on the accompanying cd The following appendices include the remote control command lists setup for different control interfaces and installation and application procedures for the control software Appendix 1 0 Remote Control Commands The commands and responses listed in Table 1 Table 2 and Table 3 are the same for all communication protocols RS 232 USB Ethernet and GPIB Once the ERM 202 receives a command it goes into remote control mode and the front panel keypad is locked A small R will appear on the screen Press LOCAL ERM 202 2 or ENTER ERM 202 1 to return to front panel control Command Lists Table 1 Command list ERM 202 2 System Commands Command Description Response IDN Queries the instrument product number IDN GP ERM 202D V1 4 SN 203210000268 Else Enn See Table 3 for error codes VER Queries the Firmware Version VER V1 4 20150430 Version Dependent RST Reset all operation parameters to default E00 if successful values Else Enn See Table 3 for error codes SAV nn Save the data currently shown on the front E00 if successful panel to location nn Range for nn 00 to 99 Else
56. t button next to the box Ranges for each parameter are listed to the right of its Set button After setting new parameters use the Query buttons to check that the new settings were successfully stored After each button is clicked the ERM 202 s response is displayed in the Response box at the bottom of the page The response to a successful Set command is generally E00 while the response to a successful query command is the requested data ERM 202 User Guide Tt ERM 202D InstrumentMain VISA vi gt x HS ERM 202 Dual Channels Lannnal Dhatanire ae En Veliel Ui B TIERE Polarization Extinction Ratio Meter Ver 1 2 Function Setup GPIB STI 1730 GPiB wavelength1 Kia a IEEE 1550 1310 wavelengtn2 MZ TE et 1550 1310 bi zi ST PC APC eZee Set PC APC ng ST 0 1 0 2 0 4 1 0 er Saw 0 10 15 20 25 30 ua s reference AR E 000 Set 90 90 o Responses r ERM 202S InstrumentMain VISA vi p D ERM 202 Single Channel venei WA nof PHH e Polarization Extinction Ratio Meter Ver 1 2 Setup Measurement Recall Function Setup Long Term WAV 1550 CENE 1550 1310 TYP PC amp Set PC APC SPD 0 45 Set Set 0 1 0 2 0 4 1 0 10 TIM 00 Set 0 10 15 20 25 30 Set 90 90 Wi uM REF 0 00 Responses t00 ERM 202 User Guide ERM 202 2 ERM 202 1 GPIB GPIB address of ERM 202

ERM-202 User Manual V1.1

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