User Manual - Optical Pulse Machines
Contents
1. output stage 30 TP16 In OPM LD Lin acts as reset for digipot 31 TP17 In OPM LD ps and OPM LD Lin activates LPF 1 32 TP21 In OPM LD ps and OPM LD Lin activates LPF 2 33 oO l UI TTL in 5 i N In analog In analog 5 25 option UI Os option Shall be connected to O m e O l Ui Laser avg current Average laser current monitor Out impedance gt 100K ohm monitor analog O1 Photodiode O G ot 0 5 Y is according to the monitor power analog specific LD being used 35 Temperature V 1 93 0 027 T C Out monitor analog om5 Assuming NTC thermistor with 10K ohm B 3900 500 Set temperature Voltage sets the temperature in analog 5 of the TEC controller i tt Be U Voltage temperature function is V 1 93 0 027 T C _ a B a 5V TEC Supply for the TEC controller 2000 4 75 5 25 a Warning the test jig with the module installed in it might emit hazardous laser radiation The user shall take the appropriate safety measures including safety glasses and interlock switch Optical Pulse Machines OPM JIG rev 3 User Manual Jan 20142. adji 49 TP folk adj oy Tit Fb GND R43 PaE ddj j E m H7 Eee eee EE TEC sel 4 5 33 I DC voltages terminal blocks GND Figure 1 main elements of the test Jig Warning the test jig with the module installed in it might emit hazardous laser radiation The user shall take the appropriate safety measures including safety glasses and interlock switch Optical Pulse Machines OPM JIG rev 3 User Manual Jan 2014 OPM ys Nod a 4 3 The unit under test the module shall be inserted in the middle of the test jig either vertically or horizontally with the optical output pointing to the left side The 40 pin connector J16 provides power and signaling lines to the unit under test The DB9 connector J13 above the 40 pin connector provides RS 232 or SPI serial communication The connector may also be used for connecting to a PC USB port through an USB RS232 adaptor Such adaptor can be plugged directly to the DB9 connector On the mid top side the eight dip switches SW1 and SW2 are used for 8 bit programming of the pulse width for OPM LDa modules with wide pulse width option like the OPM LDa 64 or OPM LDa 256 The other four DIP switches SW3 perform control functions The push buttons SW6 and SW7 provide the means to program manually the pulse width of modules that require 2 line serial interface With these two buttons no PC or controller is required for the programing At the left side of the jig ther
3. shorter the pulse width Amplitude An analog voltage control 0 to 2V to change the high voltage at the module s output stage This results in laser current changes with dynamic range of 5 or even more Depends specifically on the module type In most modules though the amplitude control in not implemented Set temperature An analog voltage control 0 to 2 5V to set the laser temperature through the TEC circuit For a typical 10K NTC thermistor the set temperature voltage relationship is Tset 1 93 Vset 0 027 OPM ships the jigs with Vset calibrated to 1 25V corresponds to Tset 25C Warning the test jig with the module installed in it might emit hazardous laser radiation The user shall take the appropriate safety measures including safety glasses and interlock switch Optical Pulse Machines OPM JIG rev 3 User Manual Jan 2014 OPM ys Nod a 6 Note that some modules already include potentiometers with the same calibrations In that case in order to ensure proper operation disconnect the jumpers and use the calibration of the module 7 Top side switches 7 1 Switches DO D7 The two left side quad switches form an eight bit word DO D7 to set the pulse width Some of the OPM LDa modules use 8 bits as a parallel world to control the pulse width Examples are OPM LDa 64 OPM LDa 256 Other OPM LDa series modules use only two data lines for pulse wi
4. OPM we a 1 Test Jig Rev 3 for OPM LD yyy modules User Ma Document date 20 Jan 2014 Contents P98 tee sian O Seen saee Scope ee curl P 4S oki Ome te Owect input 44 tP wW Po Iu 0 D d Pot Oo agoao O RINGS om 21 OO i i S N a Ore Jig for OPM LD yyy rd Compatibility ia JI Pt mr ll Jig board overview a bel np Power options Trigger source and signal connections Top Left side calibrations and jumpers Top side DIP switches Monitors and LED indicators eee ee eee Communication channels 10 Fan 11 Operating instructions Quick start oO a lt G lt o z o wn 12 Main connector pin out 1 Scope nual The scope of this document is to describe the test Jig rev 3 its functionality and operating instructions 2 Compatibility The Test Jig test Jig rev 3 supports a range of OPM s products that come in forms of circuit boards or modules 2 1 OPM LDa series cards and modules These products come with or without an integrated laser diode and they perform functions of Adjustable pulse generator with adjustable pulse width from 0 5ns to 1us Depends on installed options Pulse driver Efficient TEC controller 2 2 OPM LD ps series cards and modules These products offer high resolution pulse sh functions of Arbitrary waveform generator with sub nanosecond resolution Linear pulse driver Efficient TEC contr
5. TS is used as SPI s SO line 9 3 The DB9 connector may also be used for connecting to a PC USB port through an USB RS232 adaptor Such adaptor can be plugged directly to the DB9 connector Warning the test jig with the module installed in it might emit hazardous laser radiation The user shall take the appropriate safety measures including safety glasses and interlock switch Optical Pulse Machines OPM JIG rev 3 User Manual Jan 2014 OPM ys so a 10 Fan The jig may include a fan for modules with larger heat dissipation The fan is not needed for OPM LDa modules but it is required in some of the OPM LD ps modules The air flow of the fan is aimed to the center of the module For proper operation of the fan make sure that the fan has clearance of at least 3cm from any object Don t touch the fan while operating Use a shunt at the J3 jumper to activate the fan 11 Operating instructions 11 1 Make sure the test equipment you use is grounded and the lab personal has means of ESD protection The following describes the operation of the test jig while using its internal power supplies 11 2 General preparations Connect the ground terminal of the test jig J31 to your system s ground Make sure that the following potentiometers are at minimum Amplitude CW all the way Bias CCW all the way Set the jumpers J22 J25 J26 to internal mode and J27 to 5V s
6. ally lt 10 Apply the signal through the J15 SMA connector Don t apply trigger signal to the module remove the shunt from J19 J36 J37 11 6 Connect an oscilloscope with an optical input to the optical fiber of the module under test 11 7 Enable the driver by setting the switches of SW3 to TEC enable 1 Laser enable 1 RES 1 Note that 1 state is where the switch points to the module not to the board edge If you have connected the laser disable connector J11 then enable the laser by either disconnecting it or by bringing the signal voltage to TTL 1 state From this point and on use the oscilloscope to monitor the waveform 11 8 For short pulses or fine tuning set the pulse width using the Fine PW potentiometer R4 Turning R4 clockwise decreases the pulse width until it is gone If you don t find a pulse turn R4 all the way in the counter clockwise direction 11 9 For modules with wider pulses gt 5ns use the 8 bit DO D7 generator or the 22bit generator requires SPI interface through the DB9 connector Use the AE line to program the pulse and lock it 11 10 If your module includes an amplitude control option then adjust the amplitude by R2 Otherwise Use the R40 voltage adjust potentiometer at the var power supply section If the voltage must be limited to 15V then insert a shunt in J21 11 11 Set the required laser set temperature If your module has a TEC using the potentiometer R1 You can test the se
7. d module s failure On the upper right corner a fan can be installed optional The push button switch SW5 and the 8 pin connector J12 on the left are for future use Power options The various power inputs through the power jack J28 and the terminal blocks J33 J34 J35 and the jumpers J25 J26 J27 allow multiple power schemes Perform the following described power settings prior to inserting the module to the jig Warning the test jig with the module installed in it might emit hazardous laser radiation The user shall take the appropriate safety measures including safety glasses and interlock switch Optical Pulse Machines OPM JIG rev 3 User Manual Jan 2014 OPM ys Nod a 4 1 Internal voltages First step shall be connection of the test jig s ground to your system or lab s ground Use the black ground jack J31 The most simple power scheme is based on using the single 110 230 VAC power input and connect the jumpers in the jig properly The internal power supplies in the jig provide the required voltages to the module Jumper J26 connect a shunt at the upper position this selects the jig s internal 5V voltage Jumper J25 connect a shunt at the upper position this selects the jig s internal 3 3V voltage For the operation of OPM LDa series modules the 3 3V voltage is not in use Jumper J27 connect a shunt at the left position this selects the TEC circui
8. dth control DO and D1 four PW settings The eight bits are connected to the module with pull up resistors 7 2 Four switches for control functions Left to right TEC enable This switch enables the TEC circuit Driver enable This switch enables the driver including the bias current and some of the module s internal reference voltages AE Address Enable This switch shall be brought to 1 while programming the digital word of the wide pulse generator of the OPM LDa for example ins to 256ns RES Reset Bringing this switch to 1 will reset the output of the wide pulse generator of the OPM LDa optional One of the ordering options of the OPM LDa module includes a generator with 22 bit serial word The AE and RES lines in the jig also support this option 7 3 Laser disable input J11 can be used as an extra disable input for the purpose of lab system safety Shorting the two pins of J11 disables the optical transmission 7 4 Programing pulse width using a manual serial interface The push buttons SW6 and SW7 can be used for programming the pulse width data in a serial manner This is applicable to the OPM LDa 64 128 256 products if this option was ordered SW6 acts as a clock and SW7 acts as data Same functionality can be done using an external controller that is connected to the DB9 connector See details in paragraph 9 8 Monitors and LED indicators 8 1 The following monitor points are provided on the ji
9. e are 4 calibrations Each calibration is done by a potentiometer and each calibration may be disconnected by removing the shunt from the header At the left bottom side the jig has a 110 230VAC main power input that feeds an internal 12VDC could also be 20V or 24V power supply The output of this power supply is a coaxial power plug that shall be connected by the user to a power jack J28 at the the lower left side of the jig The area below the LEDs in a variable power supply 5 32V It can be used to control the amplitude signal of the module For some modules the 32V might be hazardous and therefore in selected test jigs the voltage could be limited to a different voltage range like 5V 24V Other power supplies on the jig are 5V 3 3V optional and 3 3V optional The three DC terminal blocks at the bottom of the jig are used for power feeding of voltages individually This is primarily for R amp D purposes The area right to the module is a trigger generator that includes an oscillator circuit with frequency controls The generator triggers the module in various ways internal trigger external trigger or single trigger The SMA connector above the module J15 can be used for direct input to the driver section of OPM LDa modules In most cases this connector is not populated Under the module there are 10 test points of main voltages and monitor points At the right side of the jig there are six LEDs to provide main indications of power an
10. ee paragraph 4 1 Trigger selection Select the trigger source J19 external or J37 internal or J36 single Only one shunt Shall be placed on J19 or J36 or J37 If external trigger then connect the trigger input J23 Asan extra precaution set the frequency range J20 to the low position 10K Insert the fan switch shunt J3 if required Connect the 12V coaxial power plug to the power jack Connect the 110 230V AC power Make sure that the LED indicators for voltages are on Set the required 5 to 32 voltage according to the requirements of the module under test Turn off the power voltage by disconnecting the 110 230 VAC plug Caution The OPM LD yyy series modules were not designed for hot insertion When inserting or removing the modules make sure that the power is off Insert the module to the jig See mounting options in 11 3 Make sure that the optical output is oriented to the left side as indicated on the test jig Turn the power voltage on by the 110 230 VAC plug Warning the test jig with the module installed in it might emit hazardous laser radiation The user shall take the appropriate safety measures including safety glasses and interlock switch Optical Pulse Machines OPM JIG rev 3 User Manual Jan 2014 we 11 3 Mounting options 11 3 1 Vertical installation of the driver board Vertical installation in described in Fi
11. g under the module left to right Ground TP 18 5V TP 19 Warning the test jig with the module installed in it might emit hazardous laser radiation The user shall take the appropriate safety measures including safety glasses and interlock switch Optical Pulse Machines OPM JIG rev 3 User Manual Jan 2014 3 3V generated by the jig TP20 Peak laser current TP21 Average laser current TP22 Power optical TP23 3 3V TP24 Temperature TP 25 3 5V TEC TP 26 Ground TP 27 e Another important monitor point is the 5 to 32V voltage It shall be measured at the F1 fuse e The voltages shall be measured by DVM with input impedance of gt 10K ohm 8 2 The following LED indicators are provided at the right side top to bottom 5V 32V 5V 3 5V TEC 3 3V 3 3V Module OK indicates that the optical power is above the predefined threshold and that the TEC circuit has not failed 9 Communication channels 9 1 The DB9 connector J13 is in charge of providing communication channels to the jig It provides RS 232 or SPI or proprietary serial communication For RS 232 the following table describes the 9 pins functionality 5 erent Dab 1 Soldered to DBS Metal Shield 9 2 Some of the pins got dual role to support also SPI bus Pin 3 TD is used as the SPI s SI line pin 4 TDR is used as SPI s SC line and pin 8 C
12. g trigger 19 DO CD Out DO bit in 8 bit wide pulsewidth TTL in 0 5 Pins 19 to 26 can be used in generator Also DO in 1 12ns generator 3 ways 8 bit parallel pulse 20 D1 Sl TDin D1 bit in 8 bit wide pulsewidth TTL in generator Also D1 in 1 12ns generator 21 D2 RDout D2 bit in 8 bit wide pulsewidth TTL in generator 22 D3 SC DTRin D3 bit in 8 bit wide pulsewidth TTL in generator 23 D4 DSRout D4 bit in 8 bit wide pulsewidth TTL in generator 24 D5 RTSin D5 bit in 8 bit wide pulsewidth TTL in 0 5 generator 25 D6 SO CTSout D6 bitin 8 bit wide pulsewidth TTL in 0 5 generator Option SPI SO Warning the test jig with the module installed in it might emit hazardous laser radiation The user shall take the Option Requires assembly changes 50 ohm input impedance an O lt gt a 5 5 Ensures a true O level at shutdown UI width control or 3 line SPI control or RS 232 0 5 Option SPI SI E na Option SPI SC oO l uw appropriate safety measures including safety glasses and interlock switch Optical Pulse Machines OPM JIG rev 3 User Manual Jan 2014 OPM s xt os yo oF 26 D7 Rlout D7 bit in 8 bit wide pulsewidth generator 27 Fine PW Increasing the incoming voltage decreases the pulse width 28 Amplitude Controls the voltage supply of the OPM LDa for the driver s
13. gure 3 Note that the fiber output is at the left side In order to ensure good heat conduction and mechanical stability use the mounting screws and the brackets a O a ae 2 WNdO 40 bir tid Oidi PT Zee taa a 2 O y had tee hie og C YIPIM asing Figure 3 Vertical mounting OPM se en oe 10 11 3 2 Horizontal installation of the driver board Horizontal installation is possible only with some of OPM s modules Note that the fiber output shall always be at the left side of the jig as indicated The horizontal mounting is not suitable for modules with a butterfly laser diode that require a heat sink In order to ensure good heat conduction from the module to the jig board use the three or five mounting screws 11 3 3 Installation using an extension cord The extension cord allows flexibility in placement of the module in lab setups or system tests The extension cord standard length is 50cm Other lengths are available too upon request The extension cord is especially useful when using modules with free space transmission no fiber Note that the key of the connectors is at pin 40 not pin 1 Figure 4 shows an installation with an extension cord Figure 4 Using the extension cord Using the OPM LD ps with extension cord In test jigs that are shipped with OPM LD ps module the key of the 40 pin connector was removed Therefore you must be very careful in connecting t
14. he extension cord to the test jig with the right polarity pin 1 and 40 are clearly indicated on the test jig and on the cable Warning the test jig with the module installed in it might emit hazardous laser radiation The user shall take the appropriate safety measures including safety glasses and interlock switch Optical Pulse Machines OPM JIG rev 3 User Manual Jan 2014 OPM ys Nod a 11 11 4 Setting the trigger frequency skip this part if you re using direct input 11 4 1 You can monitor the trigger frequency using the trigger output signal at the SMA connector J17 11 4 2 Incase of using on jig internal trigger oscillator Set the frequency by tuning the potentiometer R38 and select the frequency range J20 Select internal trigger by the jumper J37 See 5 1 for details on frequency ranges 11 4 3 In case of using external trigger source Set the external source to the required frequency Levels shall be TTL or LVTTL Select external trigger by the jumper J19 11 5 In case of using direct input skip this part if you are using a trigger Some of the OPM LD yyy modules support the feature of direct input If your module supports this feature Set the required waveform of your external test equipment Make sure you don t exceed voltage swing of 3Vpp Make sure the duty cycle is smaller than the recommended one for the specific module under test typic
15. ion of OPM LDa series modules the 3 3V voltage is not in use This power input is protected against reverse voltage and against overvoltage by a parallel zener diode For enhanced circuit protection make sure that your external 3 3V source is set to current limit of 1A Jumper J22 connect a shunt at the right position to select externally supplied voltage 5 to 32V through the terminal block J33 This power input is protected against reverse voltage but it is not protected against overvoltage Warning the test jig with the module installed in it might emit hazardous laser radiation The user shall take the appropriate safety measures including safety glasses and interlock switch Optical Pulse Machines OPM JIG rev 3 User Manual Jan 2014 oe OPM or sos of 5 Trigger source and signal connections 5 1 The test jig offers three ways to trigger the module external trigger internal trigger using the jig s internal oscillator or single trigger using a push button switch 5 1 1 External trigger mode Select the external trigger source by placing a shunt on jumper J19 The trigger provided externally at the SMA connector J23 will be active The trigger shall be in levels of TTL or LVTTL Do not exceed the voltage range from 0 to 5V 5 1 2 Internal trigger mode Select the internal trigger by placing a shunt on Jumper J37 The trigger signal comes from the jig s built in oscil
16. lator with tunable frequency in the range of 4KHz to 20MHz The oscillator s frequency is controlled by the potentiometer R38 and the jumper J20 The jumper J20 has three positions Low frequencies 4KHz to 0 2MHz down position Rset vs Desired Output Frequency Mid frequencies 40KHz to 2MHz disconnect the jumper High frequencies 400KHz to 20MHz up position See details in figure 2 1000 OPM ships the jigs with frequencies calibrated to 10KHz 100KHz 1MHz depends on the J20 position 100 Z I 10 N T ott i i eal FH Edl MEN A 1k 10k 100k 1M 10M 100M DESIRED OUTPUT FREQUENCY Hz Figure 2 On board oscillator 5 1 3 Single trigger A single trigger activated by a push button can be generated Move the shunt to the jumper J36 Each push of the SW4 push button generates a single trigger 5 1 4 An output trigger monitor is provided at the SMA connector J17 You may use this signal to trigger your oscilloscope 50 ohm or high impedance 6 Left top side calibrations and jumpers At the left top side of the jig there are 4 calibrations Each calibration is done by a potentiometer and each calibration may be disconnected by disconnecting the shunt of the near jumper Bias current An analog voltage control O to 1V for laser bias current in the range of 0 to 50mA Pulse width An analog voltage control 0 to 2V for fine pulse width variations up to approx 3ns The higher the voltage the
17. oller Built in laser diode PC software and GUI to support pulse programming and monitoring functions aping and perform Warning the test jig with the module installed in it might emit hazardous laser radiation The user shall take the appropriate safety measures including safety glasses and interlock switch Optical Pulse Machines OPM JIG rev 3 User Manual Jan 2014 OPM 92 2 ot perform functions of Linear pulse driver Efficient TEC controller Built in laser diode 3 Jig Board Overview Figure 1 describes the main elements of the test Jig DIP Switches lave disconect un ae Lay ci i h m Pulse width H sese sens E E Trill ee vez Direct input i IEE yyy rd Jig for OPM LD lt lt Optical transmission lt TPES TF2 Tria TP20 TP I TR2z TP24 F Ti i w L l i 33V 9 Peak_eurr Power LAV Temp Avg curt Test Points AC Power AC power in 110 230VAC AC to DC power supply Power jack input RE Ehi BERE 3 5TE 2 3 OPM LD Lin series cards and modules These products offer electrical to optical conversion E O and Serial prog of Trigger generator FAN pulse width RS 232 SPI Trigger generator J7 Trig output LED a7 indicators ae kernal EEL T ia tid aa Beis external l MB LEF BINngie i Ma SS a atong S Var Sas supply RAs ug OOK E3 eal cise wrt et ti E ESS a ad ti 167 RN R36 yy O power supply i ng Trig input Freq
18. ser Manual Jan 2014 OPM ys rm reg o 13 12 Main connector pin out Samtec connector SFM 120 01 L D note that the key is at pin 40 Current rating 3 9A 60C Description Type Max Voltage Comments Current limits V mA pe ZECE E Power 1000 Required stability 2 Out TTL U1 Threshold may vary upon Module OK out If optical power monitor exceeds threshold than output goes TTL high Driver enable Enable transmission of short pulses lt 12ns Active high ae Vb 20 In analog ay i ss 3 3V TEC 3 3V supply ep e C we purpose test point es Test TestpointTP13 Wells customer request In TTL 500 3 5 to O Functionality of the two pins depends on the specific JIG2 order number 2000 Warning the test jig with the module installed in it might emit hazardous laser radiation The user shall take the appropriate safety measures including safety glasses and interlock switch Optical Pulse Machines OPM JIG rev 3 User Manual Jan 2014 OPM ys oe eo In direct Incoming pulse is converted to In analog 100 an optical pulse The response AC is not guaranteed to be linear coupled Resets the wide pulse In TTL generator Address enable for In TTL 5 0 5 programming the wide pulse generator 18 Trig in Pulse is initiated by rising edge in TTL 100 055 of incomin
19. t voltage on the jumper j6 The voltage that represents the actual laser temperature can be tested in TP25 The voltage temperature relation depends on the specific module under test In most modules that include a 10K NTC thermistor the relation is T C V 1 93 37 For temperature of 25C the voltage is 1 25V The OPM LD yyy modules come with a provided heat sink that shall provide sufficient heat dissipation in lab conditions 10C to 40C If you use the module in temperatures exceeding this range or if you Calibrate the temperature to extreme values you may need to provide improved means to dissipate the heat Fan or an extension to the heat sink Warning the test jig with the module installed in it might emit hazardous laser radiation The user shall take the appropriate safety measures including safety glasses and interlock switch Optical Pulse Machines OPM JIG rev 3 User Manual Jan 2014 OPM wore yo yar 12 11 12 Set the required bias current If your module has a bias option You can test the set voltage on the jumper j9 The resulting bias current is V 20 For example 400mV will result in bias current of 20mA Warning the test jig with the module installed in it might emit hazardous laser radiation The user shall take the appropriate safety measures including safety glasses and interlock switch Optical Pulse Machines OPM JIG rev 3 U
20. t voltage to be 5V For the operation of modules with no TEC controller this is not in use Jumper J22 connect a shunt at the left position to select internally generated voltage 5 to 32V Jumper J21 If the module under test has a 15V compliance voltage limitation insert a shunt The R40 potentiometer sets the compliance voltage for the laser and controls the optical signal amplitude You can monitor this voltage at the fuse f1 Connect the coaxial power connector of the 110 230VAC power supply to the power jack J28 Connect the 110 230VAC power using an AC power cord 2 wire to the AC power input at the left bottom corner NOTE it is important to connect disconnect the power using the 110 230VAC plug 4 2 External voltages For R amp D tests that require variable power supply voltages or special voltage values use the three terminal block connector pairs at the bottom side of the jig J33 J34 J35 Set three jumpers in the following way Jumper J26 connect a shunt at the lower position This selects the jig s external 5V voltage through the terminal block J34 This power input is protected against reverse voltage and against overvoltage by a parallel zener diode For enhanced circuit protection make sure that your external 5V source is set to current limit of 1 5A Jumper J25 connect a shunt at the lower position This selects the jig s external 3 3V voltage through the terminal block J35 For the operat
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