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© 2018 Thorlabs

3 Operating the ITC4000 Series

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Derivative (D) parameter:

Change again repeatedly between temperature set points ±1...2°C around your desired target
temperature while observing the settling behavior of the actual temperature.

Increase the D parameter gradually by turning the adjustment knob (F8) clockwise.

Higher values will decrease the amplitude and number of overshoots. Too high values will in-
crease again overshoot effects or will even lead to an unstable system. The D parameter is set
correctly when the actual temperature settles at a value close to the temperature set point after
a minimum of overshoots. Due to the disabled Integral constant, a temperature deviation may
remain.

Integral (I) parameter:

Change again repeatedly between set temperatures ±1...2°C around your desired target tem-
perature.

Increase the I parameter gradually by turning the adjustment knob (F8) clockwise.

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Summary of Contents for ITC4000 Series

Page 1: ...Laser Diode Current and Temperature Controller ITC4000 Series Operation Manual 2018 ...

Page 2: ...Copyright 2018 Thorlabs Version Date Item No 3 9 10 Jul 2018 M0009 510 312 ...

Page 3: ...g Interlock and LD ON Monitoring 18 3 1 6 Laser Protection LD Enable Input 19 3 1 7 Pin Assignment of the TEC Output Jack 20 3 1 8 Connecting a TEC Element 21 3 1 9 Connecting a Temperature Sensor 21 3 1 9 1 NTC thermistor 22 3 1 9 2 Current Temperature Sensors AD590 or AD592 22 3 1 9 3 Voltage Temperature Sensor LM35 22 3 1 9 4 Voltage Temperature Sensors LM335 LM235 or LM135 22 3 1 9 5 Platinum ...

Page 4: ... 1 General remarks 59 5 2 Line voltage settings 59 5 3 Replacing the mains fuses 61 5 4 Troubleshooting 6 Appendix 63 63 6 1 Technical Data 63 6 1 1 ITC4001 Laser Control 66 6 1 2 ITC4002QCL Laser Control 69 6 1 3 ITC4005 Laser Control 72 6 1 4 ITC4005QCL Laser Control 75 6 1 5 ITC4020 Laser Control 78 6 1 6 ITC4000 Series Temperature Control 80 6 1 7 ITC4000 Series Common Specifications 82 6 2 Se...

Page 5: ...97 6 9 Exclusion of Reliability and Copyright 98 6 10 Thorlabs End of Life Policy WEEE 99 6 11 List of acronyms 100 6 12 Thorlabs Worldwide Contacts ...

Page 6: ...international partners are looking forward to hearing from you Thorlabs GmbH Warning Sections marked by this symbol explain dangers that might result in personal injury or death Always read the associated information carefully before performing the indicated procedure Please read this advice carefully This manual also contains NOTES and HINTS written in this form Attention Paragraphs preceded by t...

Page 7: ...ith excellent temperature stability and PID Auto Tune function Temperature loop monitoring for laser protection A wide variety of protection features safeguard the laser diode and the TEC element from damage USB interface for remote operation supporting the USBTMC protocol SCPI compliant command set VXIpnp Instrument Drivers for various programming environments including NI LabVIEW NI LabWindows C...

Page 8: ...ding fuses are inserted If not please change the line voltage setting see section Line voltage settings and the mains fuses see section Replacing the mains fuses To avoid risk of fire only the appropriate fuses for the corresponding line voltage must be used All modules must only be operated with duly shielded connection cables Attention The following statement applies to the products covered in t...

Page 9: ...do so may violate FCC and ICES rules Attention Mobile telephones cellular phones or other radio transmitters must not be used within the range of three meters of this unit since the electromagnetic field intensity may then exceed the maximum allowed disturbance values according to IEC61326 1 This product has been tested and found complying with the limits according to IEC 61326 1 for using connect...

Page 10: ...matic protection equipment e g for temperature monitoring Laser ON OFF LED Please refer to section Connecting the interlock and LD ON monitoring The laser can only be operated with the interlock input being closed Open circuit detection for the laser diode If the connection to the laser is interrupted even for a short time during operation an immediate emergency switch off occurs The open circuit ...

Page 11: ...re Controller LD current range 0 20 A TEC current 0 15A CAB4000 Shielded cable to connect the TEC output of the ITC4000 controller to a Thorlabs LM14S2 LDM21 or TCLDM9 laser diode mount male 17W2 mixed DSUB connector to female 9 pin DSUB connector The rated TEC current is 5A CAB4001 Shielded cable to connect the TEC output of the ITC4000 controller to a Thorlabs high power TEC mount or laser diode...

Page 12: ...ed TEC current 20A With ITC4001 ITC4002QCL ITC4005 or ITC4005QCL 1 CAB4005 shielded cable to connect the laser diode controller to a Thorlabs LM14S2 LDM21 or TCLDM9 laser diode mount male 13W3 mixed DSUB connector to male 9 pin DSUB connector rated laser current 5A With ITC4020 1 CAB4006 shielded cable to connect the laser diode controller to a Thorlabs high power laser diode mount male 13W3 mixed...

Page 13: ...ked F2 Line switch On Off F3 LC display F4 Softkeys for menu navigation F5 ESC Escape key F6 TEC ON On Off button for TEC output with TEC ON LED green and ERROR LED red F7 LD ON On Off button for LD output with LD ON LED green and ERROR LED red F8 Adjustment knob to change set values push to enter ...

Page 14: ...er current monitoring 0 10 V R7 Serial No Serial number of the unit R8 Cooling fan R9 LASER OUTPUT Laser diode output and optical sensor input 13W3 mixed DSUB jack R10 LINE IN Mains connector and fuse holder R11 USB connector R12 4 mm banana jack for chassis ground R13 DIGITAL I O MiniDin 6 jack for 4x digital I O I O supply voltage internal 12V and GND R14 DEVIATION OUT Actual temperature deviati...

Page 15: ... F8 Push this knob or the Done key to enter the adjusted value If several menu items are displayed you can select them also by turn ing and then pressing the adjustment knob If changing a parameter isn t permitted in the actual operating mode or you arrive at the end of a parameter number range entering is declined and a short beep is audible From any menu level you can navigate to the next higher...

Page 16: ...making it impossible to read the dis play Sound Signals Here you can disable or enable the audibility of the error beeps and the menu navigation click response Temperature Unit The preferred temperature unit can be selected C Celsius F Fahrenheit and K Kelvin The conversion between the units will be calculated automatically Line Frequency According to the mains properties the line filter frequency...

Page 17: ...round A2 Laser diode cathode with polarity AG A3 Laser diode anode with polarity CG 3 9 Not connected Attention The maximum laser output current for the ITC4020 is 20A Use only the specified con nector type 13W3 mixed DSUB plug with high power contacts A1 A2 and A3 rated for at least 20A current For wiring of A1 A2 and A3 use only wires rated for at least 20A cur rent If Thorlabs laser diode mount...

Page 18: ...de modules 3 1 3 Connecting an Optical Sensor as a Feedback Source The ITC4000 Laser Diode Controllers support optical current sensors e g photodiodes and optical voltage sensors e g thermopiles for monitoring the laser power output Both sensor types can be used as a feedback source for a constant power loop to stabilize the laser output power 3 1 3 1 Connecting a photodiode The photodiode input c...

Page 19: ...3 1 4 Connecting the Laser Voltage Measurement The ITC4000 controllers offer laser voltage measurements with standard accuracy or enhanced accuracy Without additional wiring the laser voltage is measured at the LASER OUTPUT jack R9 at the rear panel of the unit two terminal measurement This leads to a measure ment error due to the voltage drop along the current lines to the laser diode so a slight...

Page 20: ...various protective interlock functions An external emergency key opener is connected to the two pins of the interlock or in series to other interlock switches If the laser is to be operated in a closed setup lab a switch can be installed in a suitable position interrupting when the setup lab door is opened If the interlock line is led in parallel to the laser current line a cable damage monitoring...

Page 21: ...100 1000 AD590 592 LM35 135 235 335 5 12 Analog ground LM35 135 235 335 other 14 I O 1 wire currently not used 6 Digital ground for I O 1 wire 8 13 Not connected 1 TEC element output pins and voltage measurement input pins are ground free Do not connect any of these pins to Ground otherwise the electronic circuit will be damaged Attention The maximum TEC output current for the ITC4000 Series is 15...

Page 22: ...of a temperature controller Turn on the ITC4000 Select the appropriate sensor type by pressing Menu Scroll to Temperature Sensor Setup by turning the adjustment knob Switch into the the Temperature Settings by press ing the Enter button or the adjustment knob F8 and select the appropriate sensor Menu Temperature Sensor Setup Temperature Sensor Confirm by pressing Done or the adjustment knob F8 aga...

Page 23: ... connected between pin 3 and pin 4 of the 17W2 mixed DSUB jack R16 Operating elements at the rear panel The polarity is unimportant if the thermistor is ungrounded If one pin of the thermistor is grounded for example in a laser module this pin must be connected to pin 3 With a thermistor as temperature sensor the resistance can be converted into the temperature by using the Exponential or the Stei...

Page 24: ... and pin 12 of the 17W2 mixed DSUB jack TEC OUTPUT R16 Operating ele ments at the rear panel at the rear of the unit 3 1 9 4 Voltage Temperature Sensors LM335 LM235 or LM135 If the temperature voltage transducer LM135 LM235 or LM335 is used as temperature sensor it has to be connected to pin 10 pin 11 also and pin 12 of the 17W2 mixed DSUB jack TEC OUTPUT R16 Operating elements at the rear panel a...

Page 25: ...TEC ON Monitoring Pin 1 and pin 15 of the TEC OUTPUT jack R16 are test contacts to determine whether a TEC setup is connected or the connection has been interrupted These pins must be connected externally by a wire total resistance 430 W When this interlock connection is opened the ITC4000 switches off the TEC output current automatically If the TEC output was off it cannot be switched on and an e...

Page 26: ...s laser driver Simply connect the corresponding plug of the laser driver to this output of the ITC4000 The laser will be switched off if the laser temperature moves out of the temperature window Further details can be found in the operation manual of the respective laser driver Analog temperature deviation output A temperature output DEVIATION OUT R14 see section Operating elements at the rear pan...

Page 27: ...ndow by pressing the ESC key In the display configuration menu the display can be configured to show two four or six values Factory setting is the six value screen To change a set point displayed on the screen select it using the softkeys or turning the adjust ment knob Press the Modify button or the adjustment knob to get into the entry mode Adjust the value by turning the adjustment knob The ent...

Page 28: ...This feature is required to conform several government requirements like the CDRH US21 CFR 1040 10 Voltage Protection The voltage protection is an additional protection feature for the laser diode It is recommended to set the voltage protection about 0 5V higher than the nominal laser voltage If the protection voltage is reached the laser output will be switched off Protection voltages setting ran...

Page 29: ...etup menu you can change the operating mode of the ITC s laser current driver between Constant Current mode and Constant Power mode In Constant Current mode an internal current loop to the laser will be closed You can set the laser output current in Ampere read back and display the actual laser current In Constant Current mode a preselec ted pulse regime enabled in section QCW Pulse Settings may w...

Page 30: ...or thermopile voltage will be calculated by the ITC4000 Firmware Note The photodiode current the thermopile voltage and the power limit values shouldn t be set to zero otherwise the laser current may be limited by these power limits in constant current mode If a power limit gets active in constant current mode the operation mode changes over to con stant power mode The response time of these limit...

Page 31: ...ection Setting the LD source parameters For constant current mode only the laser current can be adjusted This value can also be changed from the measurement screen if one of the displayed values is the laser current set point In constant power mode you can adjust the photodiode current or the thermopile voltage de pending on the power feedback source selected in section Setting the LD source param...

Page 32: ...ed photodiode BIAS State On or Off an applied reverse bias voltage is used to reduce the response time of the photodiode BIAS Voltage 0 to 10 V reverse bias voltage value The sign is depending on the selected polarity Response entered in mA W is used to display a calibrated power value For using photodiode sensors in the constant power loop please choose photodiode input as power feedback source p...

Page 33: ...ges Please choose the 20mA range for higher photo currents and the 2mA range for higher sensitivity BIAS State The BIAS State switches the adjusted BIAS voltage On or Off A BIAS voltage offers a shorter response time of the connected photodiode For the maximum permitted reverse voltage please refer to the data sheet of the used photodiode BIAS Voltage The BIAS voltage can be adjusted from 0 to 10V...

Page 34: ... R9 or the BNC jack OPT SENSOR IN R4 on rear For using the 13W3 DSUB jack LASER OUTPUT please select DSUB con nector In other case please select Rear Panel BNC Note If the photodiode input route is set to the Rear Panel BNC a settings conflict will be shown In this case set the photodiode input route to DSUB connector Range Four voltage ranges from 10mV to 10V are offered For thermopile sensors th...

Page 35: ...source parameters In this mode the percentage refers to the peak to peak value of the op tical power in relation to the selected power range The external modulation input allows a precision power level control or a wavelength tuning of the laser When using an external modulation source please connect the external source to the MODULATION IN BNC jack R5 on rear of your ITC4000 and switch the modula...

Page 36: ...e internal adjusted DC value is zero The laser current can be monitored at the ANALOG CONTROL OUT jack R6 at the rear panel Note If the laser current or the laser power reaches the adjusted limits the status indicators I LIMIT or P LIMIT are shown and the green LD ON LED is flashing The modulation will be clipped to the adjusted limit values Attention The input voltage at the Modulation Input BNC ...

Page 37: ...e can only be enabled in constant current mode Otherwise the error message Wrong LD Source Operating Mode will be shown In this case please set the LD operating mode to constant current please refer to section Setting the LD source parameters Trigger Source This parameter specifies the QCW pulse trigger source Internal current pulses are generated regularly with the specified period frequency Exte...

Page 38: ...CW pulse and can be set from 100µs to 1s pulse width Hold parameter Sets the parameter to be held constant when the pulse period or the frequency changes The hold parameter can be the duty cycle or the pulse width If the trigger source is set to external the following parameters will be shown Minimum pulse period The minimum pulse period indicates the minimum permitted time between the rising edge...

Page 39: ...r are known and entered the ITC4000 of fers a temperature control in Celsius Fahrenheit or Kelvin Setting the TEC current limits In the TEC Source Setup menu the TEC current limit for the constant current and the constant temperature mode can be set This feature protects the TEC element against excessive TEC current Setting the temperature set point limits In the TEC Source Setup menu the temperat...

Page 40: ...RTD sensor 1000 W at 0 C LM35 Voltage sensor 10 mV C 0 V at 0 C LM335 Voltage sensor 10 mV K 0V at 0 K means also LM235 LM135 Confirm your choice with Done or by pressing the adjustment knob again For IC sensors the calculation coefficients are predetermined by your ITC4000 1µA K for the current sensors AD59x 10mV C for LM35 and 10mV K for LMx35 If no temperature sensor is connected or if the temp...

Page 41: ...TC4000 controllers offer an offset compensation for temperature sensors The setting range is 10 C Use a calibrated thermometer to verify the real sensor temperature From this subtract the temperature displayed by the ITC4000 take care of the proper signs Enter the result as Sensor Offset in the Temperature Sensor Settings Menu The displayed actual tem perature will be shifted by this amount and wi...

Page 42: ...met ers for the respective method can be set in the two additional menu items as shown below For the Exponential Method the required parameters are R0 T0 and β You can find these val ues in the data sheet of your thermistor R0 is the resistance value at the nominal temperature T0 for most thermistors T0 is 25 C The β value is a material specific thermistor constant For the Steinhart Hart calculati...

Page 43: ...possible to find the optimal parameters A PID Auto Tune function can help to find the optimal parameters easily see section PID auto tune A manual tuning of the P I and D parameter can be done with the following steps Set the Temperature set point to your required temperature Set the Proportional parameter to a very low value e g 0 2 and the Derivative and Integral parameters to minimum 0 in the P...

Page 44: ...ber of overshoots This may lead to an unstable system continuous oscillation or even increasing amplitude which should be avoided The P parameter is set correctly when the oscillation is recognizably damped this means the actual temperature approaches the set point with each overshoot having about half the amplitude of the previous overshoot Due to the disabled Integ ral constant a temperature dev...

Page 45: ...he amplitude and number of overshoots Too high values will in crease again overshoot effects or will even lead to an unstable system The D parameter is set correctly when the actual temperature settles at a value close to the temperature set point after a minimum of overshoots Due to the disabled Integral constant a temperature deviation may remain Integral I parameter Change again repeatedly betw...

Page 46: ...ctly when the actual temperature reaches the set temperature in a short time with a minimum of overshoots The following table summarizes the effects of increasing the P D and I share Effects of increasing parameters Parameter Rise Time Overshoot Settling Time Steady state Er ror Proportional KP Decrease Increase Small Change Decrease Derivative KD Small Decrease Decrease Decrease None Integral KI ...

Page 47: ...ffectively within a certain temperature range of many degrees depending on your thermal setup If the system behavior for another temperature set point is not good enough you can restart the PID Auto Tune function at the new temperature set point In this case a quick 5 step Auto Tune procedure is started if the following points are true You already finished a PID Auto Tuning successfully before You...

Page 48: ... Start to run the PID Auto Tune procedure The following screenshots show a selection from the 8 steps of a full range tuning The green LED in the TEC ON key is flashing while the procedure is running Press Cancel or the ESC key to abort the procedure PID auto tune never run PID full range tuning Adjusting previously detected values PID auto tune finished successfully Attention Following the PID Au...

Page 49: ...he TEC ON key F6 see section Operating elements at the front panel is flashing and the temperature pro tection indicator flashes up The behavior of the laser output is depending on the selected in hibit mode in the Laser output settings To avoid multiple sets and resets of the window protection error in transient oscillation or during tuning steps you can adjust an appropriate Protection Reset Del...

Page 50: ...ration menu you can select the favorite screen configuration with two four or six values For each value number depending on selected values per screen you can choose one of the following set points or readings LD Source set point shown value dependent on selected operating mode LD Current set point if constant current mode or LD Optical Power set point if constant power mode LD Current set point L...

Page 51: ...Deviation Reading Temperature Sensor Signal Reading TEC Current Reading TEC Voltage Reading TEC Power Reading For choosing the desired values please select the appropriate line by turning the adjustment knob Then press Modify or the adjustment knob and choose your desired value Confirm your selection by pressing Done or the adjustment knob again ...

Page 52: ...ight memory spaces in the Settings Memories menu At the positions 1 3 the parameters for a temperature set point of about 25 C are pre saved for the Thorlabs laser mounts The parameter sets 4 8 can be used to save your per sonal setups If more space is required and you don t need the pre saved parameter sets 1 3 you may overwrite them Select the desired data set by turning the adjustment knob or b...

Page 53: ... means of the LD ON TEC ON buttons F6 and F7 see section Operating elements at the front Operating Elements panel The name of the data set can be changed in the Edit Memory Name menu In the Edit Memory Name menu you get a table of characters Select a character by turning the adjustment knob F8 and then press Confirm The selected character will be inserted in the text field Delete mistyped characte...

Page 54: ...nal or higher external voltage up to 24 V The figure below shows the I O port basic circuit applicable for each channel Any I O line configured as input accepts TTL levels 0 V 5 V and is tolerant of higher voltages up to 24 V When the input is left open an internal 5 V pull up resistor in series with a diode shifts the input to high level Any I O line configured as output can source up to 2 mA whe...

Page 55: ...ust be set HIGH The maximum source current is 2 mA I O port sink operation In above schematic the output drives a relay in sink operation Note that the external relay coil is connected between the digital I O line pins 1 4 and 12 V pin 6 To energize the external relay the output level of the digital I O line must be set LOW The maximum sink current is 400 mA If a lower supply voltage is required f...

Page 56: ...arallel to the relay coil The internal 12 V supply which passes a serial diode is overridden and non effective in this case In Digital I O Port menu the direction of each port can be set to input or output In addition the output level of each I O port can be set if configured as output The actual pin level of each port pin is monitored and displayed in the third line For enhanced controlling pleas...

Page 57: ...age Handling Display Brightness Display Contrast Sound Signals and Update Capability For detailed explanations please see section Getting Started System Preferences 3 19 Remote Control This menu displays the remote control state of the device 3 20 Information The last menu topic displays important information on the unit such as type serial number date of last calibration and software versions 13 ...

Page 58: ...he accompanying data carrier Please see also the SCPI Programmers Refer ence Manual for a detailed description of the instrument s command set When receiving a command the ITC4000 will enter its Remote mode This will be indicated by the REMOTE Symbol in the Status Bar The right softkey F4 will serve as a Local button which switches back from Remote mode to Local operations mode In Remote mode the ...

Page 59: ... Thorlabs DFU wizard successfully you must have Administrator privileges on the PC and the instrument must be powered down or disconnected from the USB Follow the instructions below to upgrade your instrument Install the Thorlabs DFU Wizard on your PC Download the new Firmware file from the Thorlabs web site www thorlabs com Switch on your instrument and connect it to a USB port of your PC Make su...

Page 60: ... 2018 Thorlabs 58 ITC4000 Series Note Do not switch off the instrument or disconnect the USB cable during the firmware download ...

Page 61: ... from adverse weather conditions The ITC4000 controllers are not water resist ant Attention To avoid damage to the ITC4000 controllers do not expose it to spray liquids or solvents Cleaning The unit and the display can be cleaned with a cloth dampened with water You can use a mild 75 Isopropyl Alcohol solution for more efficient cleaning 5 2 Line voltage settings The ITC4000 Series controllers ope...

Page 62: ...e fuse holder by bending its two plastic retainers with the aid of two small screwdrivers The retainers must be pressed towards the center of the fuse holder 3 Replace the defective fuses R15 We recommend changing both fuses even if only one fuse has opened Press in the fuse holder into the mains jack until locked on both sides 4 Switch on the unit If it cannot be switched on please contact your s...

Page 63: ...he interlock circuit close Please refer to section Connecting Interlock and LD ON Mon itoring Verify if the output voltage protection is set to a value grater than the nominal laser for ward voltage Please refer to section Laser Output Configuration Please check all cables and the polarity settings Please refer to section Connecting com ponents to section Laser Output Configuration and to section ...

Page 64: ...ing list please contact the Thorlabs see Thorlabs Worldwide Contacts before sending the unit to Thorlabs for checkup and repair Please check the error messages before calling For information about the installed firmware please check the current firmware versions on the Information screen before calling ...

Page 65: ...mA to 1 A Setting Resolution 0 1 mA 16 µA Accuracy 0 12 reading 0 8 mA Power Monitor Input Photodiode Photo Current Measurement Ranges 0 to 2 mA 0 to 20 mA Photo Current Measurement Resolution 2 mA Range 20 mA Range 1 µA 10 µA 32 nA 320 nA Photo Current Accuracy 2 mA Range 20 mA Range 0 08 reading 0 5 µA 0 08 reading 5 µA Photodiode reverse BIAS voltage 0 to 10 V Photodiode input impedance 0 W Vir...

Page 66: ...lution Control Range 1 µV to 10 mV Control Range 10 µV to 100 mV Control Range 100 µV to 1 V Control Range 1 mV to 10 V 1 µV 10 µV 100 µV 1 mV 0 73 µV 7 3 µV 73 µV 0 73 mV Laser Voltage Measurement Measurement Principle 4 wire Measurement Resolution 1 mV 160 µV Measurement Accuracy 20 mV Laser Overvoltage Protection Setting Range 1 V to 11 V Resolution 1 mV Accuracy 50 mV Laser Current Monitor Out...

Page 67: ...te Resolution 10 µs Trigger Input rising edge triggered starts QCW pulse with internal ad justed width Input Level TTL or 5 V CMOS Output active high tracks pulse width Output Level TTL or 5 V CMOS open collector with internal pull up resistor 2 kW Dead Time To next Pulse 10 µs 1 depending on selected measurement range All technical data are valid at 23 5 C and 45 15 rel humidity non condensing ...

Page 68: ...20 mA Photo Current Measurement Resolution 2 mA Range 20 mA Range 1 µA 10 µA 32 nA 320 nA Photo Current Accuracy 2 mA Range 20 mA Range 0 08 reading 0 5 µA 0 08 reading 5 µA Photodiode reverse BIAS voltage 0 to 10 V Photodiode input impedance 0 W Virtual Ground Power Monitor Input Thermopile Voltage Measurement Ranges 0 to 10 mV 0 to 100mV 0 to 1V 0 to 10V Voltage Measurement Resolution 1 µV 10 µV...

Page 69: ... µV 730 µV Laser Voltage Measurement Measurement Principle 4 wire Measurement Resolution 1 mV 320 µV Measurement Accuracy 30 mV Laser Overvoltage Protection Setting Range 1 V to 17 V Resolution 1 mV Accuracy 70 mV Laser Current Monitor Output Load Resistance 10 kW Transmission Coefficient 5 V A 5 External Modulation Input Input Impedance 10 kW Small Signal 3dB Bandwidth CC mode without Noise Reduc...

Page 70: ...starts QCW pulse with internally adjusted width Input Level TTL or 5 V CMOS Output active high tracks pulse width Output Level TTL or 5 V CMOS open collector with internal pull up resistor 2 kW Dead Time To next Pulse 10 µs 1 depending on selected measurement range All technical data are valid at 23 5 C and 45 15 rel humidity non condensing ...

Page 71: ...Photo Current Measurement Resolution 2 mA Range 20 mA Range 1 µA 10 µA 32 nA 320 nA Photo Current Accuracy 2 mA Range 20 mA Range 0 08 reading 0 5 µA 0 08 reading 5 µA Photodiode Reverse BIAS Voltage 0 to 10 V Photodiode Input Impedance 0 W Virtual Ground Power Monitor Input Thermopile Voltage Measurement Ranges 0 to 10 mV 0 to 100mV 0 to 1V 0 to 10V Voltage Measurement Resolution 1 µV 10 µV 100 µ...

Page 72: ...µV 0 73 mV Laser Voltage Measurement Measurement Principle 4 wire Measurement Resolution 1 mV 160 µV Measurement Accuracy 20 mV Laser Overvoltage Protection Setting Range 1 V to 12 V Resolution 1 mV Accuracy 50 mV Laser Current Monitor Output Load Resistance 10 kW Transmission Coefficient 2 V A 5 External Modulation Input Input Impedance 10 kW Small Signal 3dB Bandwidth CC mode without Noise Reduc...

Page 73: ...ts QCW pulse with internal adjus ted width Input Level TTL or 5 V CMOS Output active high tracks pulse width Output Level TTL or 5 V CMOS open collector with internal pull up res istor 2 kW Dead Time to Next Pulse 10 µs 1 depending on selected measurement range All technical data are valid at 23 5 C and 45 15 rel humidity non condensing ...

Page 74: ...0 mA Photo Current Measurement Resolution 2 mA Range 20 mA Range 1 µA 10 µA 32 nA 320 nA Photo Current Accuracy 2 mA Range 20 mA Range 0 08 reading 0 5 µA 0 08 reading 5 µA Photodiode Reverse BIAS Voltage 0 to 10 V Photodiode Input Impedance 0 W Virtual Ground Power Monitor Input Thermopile Voltage Measurement Ranges 0 to 10 mV 0 to 100mV 0 to 1V 0 to 10V Voltage Measurement Resolution 1 µV 10 µV ...

Page 75: ...µV 0 73 mV Laser Voltage Measurement Measurement Principle 4 wire Measurement Resolution 1 mV 320 µV Measurement Accuracy 30 mV Laser Overvoltage Protection Setting Range 1 V to 20 V Resolution 1 mV Accuracy 70 mV Laser Current Monitor Output Load Resistance 10 kW Transmission Coefficient 2 V A 5 External Modulation Input Input Impedance 10 kW Small Signal 3dB Bandwidth CC mode without Noise Reduc...

Page 76: ...s Trigger Input rising edge triggered starts QCW pulse with internal adjus ted width Input Level TTL or 5 V CMOS Output active high tracks pulse width Output Level TTL or 5 V CMOS open collector with internal pull up res istor 2 kW Dead Time to Next Pulse 10 µs 1 depending on selected measurement range All technical data are valid at 23 5 C and 45 15 rel humidity non condensing ...

Page 77: ...mA 0 to 20 mA Photo Current Measurement Resolution 2 mA Range 20 mA Range 1 µA 10 µA 32 nA 320 nA Photo Current Accuracy 2 mA Range 20 mA Range 0 08 reading 0 5 µA 0 08 reading 5 µA Photodiode Reverse BIAS Voltage 0 to 10 V Photodiode Input Impedance 0 W Virtual Ground Power Monitor Input Thermopile Voltage Measurement Ranges 0 to 10 mV 0 to 100mV 0 to 1V 0 to 10V Voltage Measurement Resolution 1 ...

Page 78: ...0 73 mV Laser Voltage Measurement Measurement Principle 4 wire Measurement Resolution 1 mV 160 µV Measurement Accuracy 20 mV Laser Overvoltage Protection Setting Range 1 V to 11 V Resolution 1 mV Accuracy 50 mV Laser Current Monitor Output Load Resistance 10 kW Transmission Coefficient 500 mV A 5 External Modulation Input Input Impedance 10 kW Small Signal 3dB Bandwidth CC mode without Noise Reduc...

Page 79: ...ts QCW pulse with internal ad justed width Input Level TTL or 5 V CMOS Output active high tracks pulse width Output Level TTL or 5 V CMOS open collector with internal pull up res istor 2 kW Dead Time to Next Pulse 10 µs 1 depending on selected measurement range All technical data are valid at 23 5 C and 45 15 rel humidity non condensing ...

Page 80: ...0 mA NTC thermistor sensors Resistance Measurement Ranges 100 W to 100 kW 1 kW to 1 MW Temperature Control Range max 2 150 C to 150 C Resolution 100 kW Range 0 1 W 0 03 W 0 1 W 0 03 W Resolution 1 MW Range 1 W 0 3 W 1 W 0 3 W Accuracy 0 06 reading 1 W 5 W Temperature Stability 24 h typ 2 0 002 C Temperature Coefficient 5 mK C IC sensors Supported Sensors Current Temperature Sensors Voltage Tempera...

Page 81: ...ow 0 01 to 100 C Protection Reset Delay 0 to 600 s Window Protection Output TEMP OK TTL or 5 V CMOS open collector with internal pull up resistor 2 kW Temperature Deviation Output Load Resistance 10 kW Transmission Coefficient Temperature Deviation scaled to Temperature Window T 5V Twindow 0 2 TEC Voltage Measurement Measurement Principle 4 wire 2 wire Measurement Range 16 5 to 16 5 V Resolution 1...

Page 82: ...7W2 Mixed DSUB jack female Connectors for LD Enable QCW Pulse Trigger Out Opt Sensor In Modulation In Analog CTL Out TEMP Deviation TEMP OK BNC Chassis Ground Connector 4 mm Banana jack Connector for USB Interface USB type B Connector for Digital I O Mini DIN 6 Mains Input IEC 60320 Safety Features Switch ON Delay 0 to 60 s Keylock Switch yes LDC Interlock yes Overtemperature Protection yes Inhibi...

Page 83: ...40 C Pollution degree indoor use only 2 Operation altitude 2000 m Warm up Time for Rated Accuracy 30 min Weight 6 4 kg Dimensions WxHxD without Operating Elements 263 x 122 x 307 mm Dimensions WxHxD with Operating Elements 263 x 122 x 345 mm All technical data are valid at 23 5 C and 45 15 rel humidity non condensing ...

Page 84: ...erature of the laser can be influenced by the TEC current The quantity of heat flowing from the laser into the copper block and the size of the block impacts the reaction speed of the setup Usually very small components laser diodes are tempered with relatively large cooling ele ments TEC elements Thus the dissipated power must be lead away quickly and the compon ents are to be kept at the same te...

Page 85: ...ensated well by the control loop since they will almost only have an effect on the heat slope between TEC element and cooling element Possible solution improved thermal design To 3 The transient response after setting a new temperature is limited since the heat transport in the heat sink is relatively slow Furthermore the temperature slope in the heat sink must form anew The sensor which also poss...

Page 86: ...urrent supply of a cooling heating element Thermo Electric Cooler TEC Peltier Element The PID control scheme is named after its three correcting terms whose sum constitutes the manipulated variable MV Hence where Pout Iout and Dout are the contributions to the output from the PID controller from each of the three terms By tuning the three constants in the PID controller algorithm the controller ca...

Page 87: ...er source and the QCW pulse parameters can be changed TEC Source Setup TEC current limit Temperature set point limits temperature set point and current set point can be changed Temperature Sensor Setup a temperature sensor can be selected and the sensor offset can be adjusted Thermistor Settings the parameters for the thermistor temperature calculation can be entered PID Control Loop the PID contr...

Page 88: ... Menu topic description Remote Control contains the address string for use of VISA remote control Information contains device specific information like device name serial number calibration date and the current firmware version 55 55 ...

Page 89: ...A ITC4005 ITC4005QCL 20 mA ITC4020 Laser Current set point 0 A PD Range 20 mA PD Polarity CG PD Input Route DSUB connector PD Sensitivity 1 A W PD Current Limit 2 mA PD Current set point 0 mA PD BIAS State Off PD BIAS Voltage 0 V Thermopile Voltage Range 10 V Thermopile Input Route DSUB connector Thermopile Sensitivity 1 V W Thermopile Voltage Limit 1 V Thermopile Voltage set point 0 V Feedback So...

Page 90: ...eter A 1 129241 EXP 3 Steinhart Hart parameter B 2 341077 EXP 4 Steinhart Hart parameter C 0 087755 EXP 6 PID Proportional value 1 000 A K PID Derivate value 0 1 A Ks PID Integral value 0 0 As K PID Oscillation Period 0 2 seconds TEC Temperature Window 5 000 C factory default OFF TEC Protection Reset Delay 1 0 second Display 6 value screen Display Value 1 LD Source set point Display Value 2 LD Cur...

Page 91: ... 2018 Thorlabs 6 Appendix 89 Set Value Factory Setting Line Frequency Auto Update Capability Disabled ...

Page 92: ...ble active Red Critical errors Keylock LD open Interlock Inhibit Input Mode Protection Temperature Protection Protection Red flashing Internal device overtemperature OTP Refer to section Laser Output Configuration TEC ON switch LED Description Green TEC output ON Green flashing Temperature out of window temperature protection PID Auto Tune is running Red Critical errors No sensor No cable TEC open...

Page 93: ... output is dependent on the selected Inhibit input mode in the LD Output configuration menu OTP The unit is internally overheated The laser output and the TEC output are switched off and can be switched on again after a temperature drop of about 10 degrees REMOTE TMC ID LOCK The unit is in remote operation The unit is in TMC identification via remote The unit is in remote operation and a local ope...

Page 94: ...n was tripped The TEC output was switched off because the output compliance voltage was exceeded Temperature sensor failure detected The TEC output was switched off because a tempera ture sensor error occured TEC cable connection failure detec ted The TEC output was switched off because the inter lock connection was opened PID Auto Tune finished The PID Auto Tune procedure is finished check the st...

Page 95: ... with LD output on Laser current limit photo current limit thermopile voltage limit and power limit can t be set if the Laser output is on Not permitted with TEC output on Operation is not allowed while the TEC output is switched on This is valid e g for the TEC current limit and the temperature sensor selection Wrong TEC source operating mode Operation is not allowed in current TEC source oper at...

Page 96: ...ase switch the unit off and on again If this error is shown again contact the Thorlabs Hotline Hardware error A device internal hardware error has occurred please switch the unit off and on again If this error continues contact the Thorlabs Hotline Calibration memory lost The calibration data in the EEPROM is invalid please switch the unit off and on again If this error is still present contact th...

Page 97: ... 2018 Thorlabs 6 Appendix 95 6 7 Certifications and Compliances This product was tested for and complies with the following standards CAN CSA C22 2 No 61010 1 04 ANSI UL 61010 1 2004 ...

Page 98: ...and or software determined by Thorlabs for this unit to operate fault free provided that they are handled according to our requirements However Thorlabs does not warrant a fault free and uninterrupted operation of the unit of the software or firmware for special applications nor this instruction manual to be error free Thorlabs is not liable for consequential damages Restriction of Warranty The wa...

Page 99: ...hase of this product In no event shall any liability exceed the purchase price of the product Please note that the content of this document is neither part of any previous or existing agree ment promise representation or legal relationship nor an alteration or amendment thereof All obligations of Thorlabs result from the respective contract of sale which also includes the com plete and exclusively...

Page 100: ...rvice does not refer to other Thorlabs products such as pure OEM products that means assemblies to be built into a unit by the user e g OEM laser driver cards components mechanics and optics left over parts of units disassembled by the user PCB s housings etc Waste treatment on your own responsibility If you do not return an end of life unit to Thorlabs you must hand it to a company specialized in...

Page 101: ...rect Current DDS Digital Direct Synthesizer ILD I current Laser Diode IPD I current Photodiode LD Laser Diode LDC Laser Diode Controller LED Light Emitting Diode NTC Negative Temperature Coefficient OTP Overtemperature PC Personal Computer PD Photodiode QCW Quasi Continuous Wave RF Radio Frequency RMS Root Mean Square TEC Thermo Electric Cooler TED Thermo Electric Driver USB Universal Serial Bus U...

Page 102: ... com Scandinavia Thorlabs Sweden AB Bergfotsgatan 7 431 35 Mölndal Sweden Tel 46 31 733 30 00 Fax 46 31 703 40 45 www thorlabs com Email scandinavia thorlabs com France Thorlabs SAS 109 rue des Côtes 78600 Maisons Laffitte France Tel 33 970 444 844 Fax 33 825 744 800 www thorlabs com Email sales fr thorlabs com Brazil Thorlabs Vendas de Fotônicos Ltda Rua Riachuelo 171 São Carlos SP 13560 110 Braz...

Page 103: ... 87 Factory settings 5 feedback inputs 57 firmware 57 Firmware upgrades I 52 I O 52 I O port 26 Inhibit 92 Instrument errors 8 18 23 interlock 33 internal function generator K 8 key switch L 8 laser current limit 26 Laser Output 18 laser safety 17 laser voltage measurements 18 LD Enable 29 LD Source set points 27 LD Source Setup 90 LED status messages 59 line voltage 38 LM335 38 LM35 26 low pass M...

Page 104: ...olon 50 Settings Memories 8 softstart 91 status indicators 21 40 Steinhart Hart 26 Switch On Delay 13 System Preferences T 23 82 TEC 37 TEC current limit 20 TEC element 23 TEC OUTPUT 19 TEC Output Jack 37 TEC Source Setup 26 temperature protection 21 temperature sensor 37 temperature set point 37 temperature set point limits 47 Temperature Window 21 38 Thermistor 21 thermistors 27 thermopile volta...

Page 105: ...www thorlabs com ...

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