+ LLH100 connection | Quantum Instruments Cascade Laser Starter Kit

Starter Kit Instruction Manual	Maintenance		39
[4] Install the new laser (4) into the holder
using small tweezers ( 0.5cm aperture).
[5] Hold the laser (4) on the gilded ceramic		1
[5] Hold the laser (4) on the gilded ceramic
pads with the tweezers pins along the axis of
the largest length of the copper submount.
[6] Place it in the receptacle parallel to the
window.
! Warning ! Avoid hitting the laser chip		2
facet on the case, it is extremely fragile.		2
[7] Place the screws (3) in the PET holder (5).		3	5
[8] Place the PET holder (5) on the two guides		3
[8] Place the PET holder (5) on the two guides
(6) on the back of the laser receptacle being
careful of maintaining the PET holder higher
on the laser side than on the back side.			6
			6
[9] Once the PET holder (5) is engaged in the		4
guides, push it down until contact with the
gilded ceramic pads is established.
[10] Screw it to the receptacle.
[11] Verify that the contact is established by
measuring with an ohm meter on the LLH100
low impedance plug.
Note: For reproducible measurement be care-
ful of measuring with the positive probe on the		Fig.27: Replacing the laser
+ LLH100 connection.

Note: If the contact is bad, adjust the plastic screws at the pressing end of the PET holder

(5).

Note: If the contact is bad, clean the bottom of the submount with grinding paper, be care- ful of not damaging the bonding wires and the laser facet.

[12]Place the dry desiccant bag close to the low impedance line plug. Only applicable if desiccation is needed and the lasers has been shipped with a desiccant bag.

Note: This operation is preferably performed in a gloves box under dry nitrogen atmosphere if the ambient atmosphere is humid (this is not necessary under normal conditions 50-60% humidity).

[13] Close the cover (2) with the screws (1).

Image 40

Quantum Instruments Cascade Laser Starter Kit manual Facet on the case, it is extremely fragile, + LLH100 connection

Contents

Quantum Cascade Laser Starter Kit Instructions Manual Web version Contents Installation TroubleshootingMaintenance Overview Use Appendix Identiﬁcation DocumentLimited waranty Manufacturer General Chapter overviewGeneralities Compliance Glossary PersonsProduct Personnel Commands style Procedure styleTypographic conventions Description style Problem Procedure eﬀects styleSee page x-y Troubleshooting style Possible causePage Safety Instructions Importance of safety instructionsNon-compliance with the safety regulations Introduction Environmental conditions General safety instructionsCompliance and informa- tion Description System Composition DFB and FP Quantum Cascade Lasers If no conﬁguration is speciﬁed, the DN pad is usedDescription Geometry of QC lasers Speciﬁcations Electrical model characteristics Electrical model Laboratory Laser HousingLLH100 LLH100 external view description Laboratory Laser Housing internal view LLH100 internal view Speciﬁcations of the Peltier connector Thermo-Electric Cooler TEC and PT100 connections Speciﬁcations of the measurement connector Measurement connection QCL pulser switching unitLDD100 QCL pulser switching unit front and rear view QCL pulse switching measuring unit GeneralitiesMeasured voltages Timing data Laser peak current Duty cycle calculation Average dissipation Laser peak voltageAccuracy considerations Trigger and logic output signals Ω TTL driver circuit QCL pulser timing unit TPG128 QCL temperature controllerTCU151 Peltier and PT100 connections Installation Chapter overview Packing listGeneral Standard items Procedure Setting the appropriate AC voltage on TCU151110-120V, 60Hz USA 220-240V, 50Hz Europe Installing the starter Kit Before beginning Connecting Starter Kit Use QCL pulse timing unit com- mand description TCU151 command description TCU151 temperature controler front panel Overview Laser utilisationProceedings Starting the TPG128 Procedure Interlock utilisation Interlock utilisation Troubleshooting Power supply reaches max cur- rent for a very low voltageDC power supply is not ﬂoating Principle Laser draws current but gives no light Laser does not draw currentQCL laser is not used with the LLH and is grounded There is no contact with the laser How to remove the covers of TCU151 and TPG128 MaintenanceOverview Replacement procedures Quantum Cascade Laser replace Ment Facet on the case, it is extremely fragile + LLH100 connection QCL UP and DN position Exchange Exchanging the laser If the ambient atmosphere is humid this is Humidity TCU151 temperature con Troller interlock setting Procedure interlock settingBefore beggining interlock set Ting Needed material Calibaration procedures Procedure calibration1 TPG128 calibration Generalities TPG128 main board TPG128 main board 2 TCU151 temperature controller calibration Procedure +5V/-5V power supply check Sensing level and range adjustement = 1.22 to Temperature Reference oﬀset adjustment Current/Voltage ratio adjustment SettingOscillator check LCD screen should display 1.00 a 7V = 70 C If needed, adjust it with the trimmer P92 Starting the power section of the instru Ment → Value displayed ≤ 1A Current adjustment→ Value displayed should tend to the deﬁned value Miscellaneous functions testing Temperature Limit testing → The temperature displayed 2 should be 035 CThreshold on → The red LED 1 should turn oﬀ Application notes Detection techniquesDirect absorption Frequency modulation technique Tildas Photoacoustic detection Photoacoustic technique Bias Circut Bias-T AppendixGeneral 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 input Unpacking NS laser from its transportation box Unpacking instructions for NS submounts