Quantum Instruments Cascade Laser Starter Kit manual TPG128 main board

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Starter Kit Instruction Manual

Maintenance

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[5]Choose the range 5 µs to 105 µs. Pot 10 turns Period on 10. Adjust the adjustable capacitor max 105 µs adj (4) in order to obtain a 105 µs long period.

[6]Pot 10 turns Period on 0. Ajust the pot Period min adj (1) in order to have a period of 5 µs.

[7]Repeat steps 5) and 6) in order to obtain 105 +/- 1 µs and 5 +/- 0,1 µs for the two settings of the pot Period.

[8]Choose the range 0.2 µs to 2.2 µs. Pot

10 turns Period on 10. Adjusts the capaci- tor max 2,2 µs adj (2) in order to obtain a period of 2.2 µs.

[9]10 turn pot Period on 0. Check that the period is 200 ns. If it is not the case, re-adjust the pot 50 ns adj (5) in order to obtain 200 +/-20 ns. (In general, it is not possible to go below 210 ns).

[10]Choose the range 0.5 µs to 10.5 µs. Pot 10 turn Period on 10. Adjust capacitor max 10,5 µs adj (3) in order to have a period of 10,5 µs.

[11]Pot 10 turns Period on 0. Check the period is 0.6 +0/-0.1 µs.

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Fig.35: TPG128 main board

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Contents Instructions Manual Web version Quantum Cascade Laser Starter KitContents Troubleshooting InstallationMaintenance Overview UseAppendix Document IdentiﬁcationLimited waranty ManufacturerChapter overview GeneralGeneralities CompliancePersons GlossaryProduct PersonnelProcedure style Commands styleTypographic conventions Description styleProcedure eﬀects style ProblemSee page x-y Troubleshooting style Possible causePage Importance of safety instructions Safety InstructionsNon-compliance with the safety regulations IntroductionGeneral safety instructions Environmental conditionsCompliance and informa- tion System Composition DescriptionIf no conﬁguration is speciﬁed, the DN pad is used DFB and FP Quantum Cascade LasersDescription Geometry of QC lasersSpeciﬁcations Electrical model Electrical model characteristicsLLH100 external view description Laboratory Laser HousingLLH100LLH100 internal view Laboratory Laser Housing internal viewThermo-Electric Cooler TEC and PT100 connections Speciﬁcations of the Peltier connectorMeasurement connection Speciﬁcations of the measurement connectorQCL pulser switching unit front and rear view QCL pulser switching unitLDD100Generalities QCL pulse switching measuring unitMeasured voltages Timing dataDuty cycle calculation Laser peak currentLaser peak voltage Average dissipationAccuracy considerations QCL pulser timing unit TPG128 Trigger and logic output signals Ω TTL driver circuitPeltier and PT100 connections QCL temperature controllerTCU151Chapter overview Packing list InstallationGeneral Standard itemsSetting the appropriate AC voltage on TCU151 Procedure110-120V, 60Hz USA 220-240V, 50Hz Europe Before beginning Installing the starter KitConnecting Starter Kit QCL pulse timing unit com- mand description UseTCU151 temperature controler front panel TCU151 command descriptionLaser utilisation OverviewProceedings Starting the TPG128 Interlock utilisation Procedure Interlock utilisationPower supply reaches max cur- rent for a very low voltage TroubleshootingDC power supply is not ﬂoating PrincipleLaser does not draw current Laser draws current but gives no lightQCL laser is not used with the LLH and is grounded There is no contact with the laserMaintenance How to remove the covers of TCU151 and TPG128Overview Quantum Cascade Laser replace Ment Replacement procedures+ LLH100 connection Facet on the case, it is extremely fragileExchanging the laser QCL UP and DN position ExchangeHumidity If the ambient atmosphere is humid this isProcedure interlock setting TCU151 temperature con Troller interlock settingBefore beggining interlock set Ting Needed materialProcedure calibration Calibaration procedures1 TPG128 calibration GeneralitiesTPG128 main board TPG128 main board Procedure +5V/-5V power supply check 2 TCU151 temperature controller calibration= 1.22 to Sensing level and range adjustementTemperature Reference oﬀset adjustment Setting Current/Voltage ratio adjustmentOscillator check LCD screen should display 1.00 aStarting the power section of the instru Ment 7V = 70 C If needed, adjust it with the trimmer P92Current adjustment → Value displayed ≤ 1A→ Value displayed should tend to the deﬁned value → The temperature displayed 2 should be 035 C Miscellaneous functions testing Temperature Limit testingThreshold on → The red LED 1 should turn oﬀDetection techniques Application notesDirect absorption Frequency modulation technique TildasPhotoacoustic technique Photoacoustic detectionAppendix Bias Circut Bias-TGeneral Utilisation What has to be kept in mind before use? Avoid reverse polarity on the input Current and voltage ranges of the Bias-T cir- cuitUnpacking instructions for NS submounts Unpacking NS laser from its transportation box