Quantum Instruments Cascade Laser Starter Kit manual Contents

Page 2

Contents

1

Identification

4

 

1.1

Document

4

 

1.2

Limited waranty

4

2

General

 

5

 

2.1

Chapter overview

5

 

2.2

Generalities

5

 

2.3

Compliance

5

 

 

2.3.1 Laser compliance

5

 

2.4

Glossary

6

 

 

2.4.1

Persons

6

 

 

2.4.2

Product

6

 

2.5

Typographic conventions

7

3

Safety Instructions

10

3.1Chapter overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.2Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.2.1 Principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.2.2Importance of safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.2.3Non-compliance with the safety regulations . . . . . . . . . . . . . . . . . . . . . . 10

3.3General safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.4 Environmental conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.5Compliance and information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4 Description

12

4.1Chapter overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.2System Composition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.3DFB and FP Quantum Cascade Lasers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.3.1Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.3.2Geometry of QC lasers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.3.3Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4.3.4 Electrical model

15

4.4 Laboratory Laser Housing(LLH100)

16

4.4.1Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.4.2Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4.4.3 Thermo-Electric Cooler (TEC) and PT100 connections . . . . . . . . . . . . . . . 18

4.4.4Measurement connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.5QCL pulser switching unit(LDD100) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.5.1Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.5.2Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.6QCL pulse switching measuring unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.6.1Generalities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.6.2Measured voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.6.3

Timing data

21

4.6.4

Laser peak current

22

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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 IntroductionCompliance and informa- tion General safety instructionsEnvironmental conditions 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 calculationAccuracy considerations Laser peak voltageAverage dissipation 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 items110-120V, 60Hz USA 220-240V, 50Hz Europe Setting the appropriate AC voltage on TCU151Procedure Installing the starter Kit Before beginningConnecting Starter Kit Use QCL pulse timing unit com- mand descriptionTCU151 command description TCU151 temperature controler front panelProceedings Laser utilisationOverview 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 laserOverview MaintenanceHow to remove the covers of TCU151 and TPG128 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 Ment→ Value displayed should tend to the defined value Current adjustment→ Value displayed ≤ 1A 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 techniqueGeneral AppendixBias Circut Bias-T 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
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