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Chapter 7: Maintenance
7.1. Laser installation in LLH housing
In this sections are presented guidelines for manipulating the laser safely and the
procedure for exchanging the laser in a LLH housing.
7.1.1. Handling
The laser should always lay flat, with its vertical axis upwards, on a flat and stable
surfaces, without touching anything around its circumference. When mounted in an
appropriate and stable holder, it can be operated in any orientation.
CAUTION:
Do not position the laser upside down. This may damage the
bonding wires and possibly the laser itself.
The most delicate parts of a QCL are the laser chip itself and the bonds connecting
it to the ceramic pads (see section 1.1.2 for details). Therefore the QCL should be
manipulated using tweezers touching the submount, as shown in figure 7.1. When-
ever possible, carry the QCL laying flat on a stable surface. Avoid contact of the front
facet of the QCL with any object, like the walls of its storage box.
Figure 7.1.: Handling of QCL.
84 QCL user’s manual v3.1.3
- 2014 ALPES LASERS SA 1
- 2014 SA iii 3
- Typesetting conventions 6
- Contents 7
- 2014 SA ix 9
- 1. Overview 11
- 1.1. ALPES LASERS products 12
- 1.1.3. QCL mounting 13
- 2014 SA 5 15
- 1.2.3. TO3 Housing 17
- 1.3. Starter kit 18
- 2014 SA 9 19
- Chapter 1: Overview 20
- 10 QCL user’s manual v3.1.3 20
- 2014 SA 11 21
- 2014 SA 13 23
- 1.4. Peripherals 25
- 1.5. Fields of applications 26
- 1.5.2. THz 27
- 2. Safety 29
- • Visible damage 30
- • Severe transport stress 30
- 2.2. Notation 31
- 2.2.1. Symbols and labels 32
- ASER radiation hazard 33
- 3. Installation 35
- 3.1. Prerequisites 36
- 2014 SA 27 37
- 3.1.2. Cooling 38
- 3.2. Receiving procedure 39
- 2014 SA 31 41
- 3.3. Connections 42
- 2014 SA 33 43
- 3.3.1. LLH 44
- 3.3.2. HHL 45
- 3.3.3. TO3 46
- 3.3.4. LDD 47
- 3.3.5. CTL cable 48
- 3.3.6. CTLm cable 49
- 3.3.7. TC-LLH cable 50
- 3.3.8. TC-HHL cable 50
- 3.3.9. CPL cable 50
- 3.3 Connections 51
- Figure 3.11.: CPL cable 51
- 3.3.10. CIL cable 52
- 3.3.11. Connection procedure 53
- • LLH housing in pulsed mode: 54
- • HHL housing in pulsed mode: 54
- 4. QCL Operation 55
- 4.1. Principle of operation 56
- 4.2. ALPES LASERS datasheet 57
- 4.3. QCL spectra 58
- 4.3 QCL spectra 59
- Chapter 4: QCL Operation 60
- 50 QCL user’s manual v3.1.3 60
- 2014 SA 51 61
- • for a temperature of 0 62
- 2014 SA 53 63
- LPES LASERS QCL is 64
- 4.4.2. Maximum LDD voltage 65
- 4.4.3. Other DFB QCL plots 66
- 4.5. Beam Properties 67
- 5. Starter Kit Operation 69
- 5.1.1. Quick Start Procedure 70
- 2014 SA 61 71
- 2014 SA 63 73
- 5.2.1. TCU startup 75
- 5.2.2. Internal/external mode 75
- 5.2.3. TCU interlock 76
- Ω TTL Gate IN 77
- Ω TTL Output 77
- Ω TTL Trig OUT 77
- Ω TTL Trig IN 77
- 73*LQWHUQDOVLJQDO 78
- *DWH,QH[WHUQDOVLJQDO 78
- 2XWSXWVLJQDO 78
- 5.3 TTL Pulse Generator (TPG) 79
- LPES LASERS or 80
- 5.3.3. Maximum duty cycle 81
- 5.4. General procedures 82
- 2014 SA 73 83
- 5.4.2. QCL shutdown 84
- 6. Technical specifications 85
- 76 QCL user’s manual v3.1.3 86
- 2014 SA 77 87
- Figure 6.6.: HHL housing 89
- Figure 6.8.: NS mounting 90
- 80 QCL user’s manual v3.1.3 90
- Figure 6.9.: ST mounting 91
- 7. Maintenance 93
- 7.1.1. Handling 94
- 7.1.2. Contact set 95
- 86 QCL user’s manual v3.1.3 96
- 7.1.3. Procedure 97
- 2014 SA 89 99
- 7.2. Calibration procedures 100
- 2014 SA 91 101
- 7.2.2. TCU calibration 102
- 2014 SA 93 103
- ±1 Ω resistor. Note: 104
- 2014 SA 95 105
- ⇒ 0,99 A 106
- ⇒ 4,99 A 106
- 2014 SA 97 107
- Chapter 7: Maintenance 108
- 98 QCL user’s manual v3.1.3 108
- 2014 SA 99 109
- 7.2.3. TPG calibration 111
- 102 QCL user’s manual v3.1.3 112
- 2014 SA 103 113
- Ω . Choose 114
- A.1. QCL wavelength range 115
- A.2. QCL electrical response 116
- B.1. Direct QCL voltage 117
- LPES LASERS 118
- B.3.1. Principle 119
- B.3.2. Connection 119
- B.3.3. Procedure 119
- 2014 SA 111 121
- B.4. CW modulation 122
- 2014 SA 113 123
- C.1. LN2 Dewar 125
- C.2. Others 126
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