Quantum Instruments Cascade Laser Starter Kit Chapter overview, Generalities, Compliance

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Chapter 2

General

2.1Chapter overview

This chapter gives basic information on system func- tions, speciﬁcations and documentation.

2.2Generalities

The indications in the present Instructions Manual, in particular the safety instructions must be com- plied with.

2.3Compliance

The Quantum Cascade Laser Starter Kit has been designed to meet all current safety at work and op- erating requirements.

2.3.1Laser compliance

The system described in this manual contains a laser device. Depending of the emission power of the laser used in the Starter Kit, the classiﬁcation may change.

According to the emission power, the laser prod- uct meets the following requirements:

CLASS I : . . . . . . . . Emission power < 10 mW

CLASS IIIb : . . . . Emission power > 10 mW

LASER BEAM

DO NOT STARE INTO BEAM

CLASS I LASER PRODUCT

Fig.1: Class I laser compliance

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Contents Quantum Cascade Laser Starter Kit Instructions Manual Web versionContents Maintenance Overview InstallationTroubleshooting UseAppendix Limited waranty IdentiﬁcationDocument ManufacturerGeneralities GeneralChapter overview ComplianceProduct GlossaryPersons PersonnelTypographic conventions Commands styleProcedure style Description styleSee page x-y Troubleshooting style ProblemProcedure eﬀects style Possible causePage Non-compliance with the safety regulations Safety InstructionsImportance of safety instructions IntroductionGeneral safety instructions Environmental conditionsCompliance and informa- tion Description System CompositionDescription DFB and FP Quantum Cascade LasersIf no conﬁguration is speciﬁed, the DN pad is used Geometry of QC lasersSpeciﬁcations Electrical model characteristics Electrical modelLaboratory Laser HousingLLH100 LLH100 external view descriptionLaboratory Laser Housing internal view LLH100 internal viewSpeciﬁcations of the Peltier connector Thermo-Electric Cooler TEC and PT100 connectionsSpeciﬁcations of the measurement connector Measurement connectionQCL pulser switching unitLDD100 QCL pulser switching unit front and rear viewMeasured voltages QCL pulse switching measuring unitGeneralities Timing dataLaser peak current Duty cycle calculationLaser peak voltage Average dissipationAccuracy considerations Trigger and logic output signals Ω TTL driver circuit QCL pulser timing unit TPG128QCL temperature controllerTCU151 Peltier and PT100 connectionsGeneral InstallationChapter overview Packing list Standard itemsSetting the appropriate AC voltage on TCU151 Procedure110-120V, 60Hz USA 220-240V, 50Hz Europe Installing the starter Kit Before beginningConnecting Starter Kit Use QCL pulse timing unit com- mand descriptionTCU151 command description TCU151 temperature controler front panelLaser utilisation OverviewProceedings Starting the TPG128 Procedure Interlock utilisation Interlock utilisationDC power supply is not ﬂoating TroubleshootingPower supply reaches max cur- rent for a very low voltage PrincipleQCL laser is not used with the LLH and is grounded Laser draws current but gives no lightLaser does not draw current There is no contact with the laserMaintenance How to remove the covers of TCU151 and TPG128Overview Replacement procedures Quantum Cascade Laser replace MentFacet on the case, it is extremely fragile + LLH100 connectionQCL UP and DN position Exchange Exchanging the laserIf the ambient atmosphere is humid this is HumidityBefore beggining interlock set Ting TCU151 temperature con Troller interlock settingProcedure interlock setting Needed material1 TPG128 calibration Calibaration proceduresProcedure calibration GeneralitiesTPG128 main board TPG128 main board 2 TCU151 temperature controller calibration Procedure +5V/-5V power supply checkSensing level and range adjustement = 1.22 toTemperature Reference oﬀset adjustment Oscillator check Current/Voltage ratio adjustmentSetting LCD screen should display 1.00 a7V = 70 C If needed, adjust it with the trimmer P92 Starting the power section of the instru MentCurrent adjustment → Value displayed ≤ 1A→ Value displayed should tend to the deﬁned value Threshold on Miscellaneous functions testing Temperature Limit testing→ The temperature displayed 2 should be 035 C → The red LED 1 should turn oﬀDirect absorption Application notesDetection techniques Frequency modulation technique TildasPhotoacoustic detection Photoacoustic techniqueAppendix Bias Circut Bias-TGeneral Utilisation What has to be kept in mind before use? Current and voltage ranges of the Bias-T cir- cuit Avoid reverse polarity on the inputUnpacking NS laser from its transportation box Unpacking instructions for NS submounts