Tsunami - Beckman Institute Laser Resource Center

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Tsunami Aligning the Photodiode PC Board , I - Prior to aligning the photodiode pc board, the laser must meet power specifications in order to provide enough signal for alignment. If the laser cannot meet specifications, align the cavity. Refer to "Cavity Alignment" earlier in this chapter. Figure 6-1 1 shows the layout of the Tsunami photodiode pc board. It is located directly over the beam splitter as shown in Figure 6-12. The photodiode is a small, round can soldered to the bottom of the board and, to align the photodiode to the reference beam from the beam splitter, the pc board is adjusted slightly to center the photodiode in the beam. Looking at the pc board from the output bezel, note that the right mounting screw passes through a narrow slot to allow lateral movement while a large rectangular slot under the left mounting screw allows movement in all directions. The photodiode is called out as CR1 and is located just to the right of the left mounting screw. To monitor the photodiode output signal level as you move the board, observe the PHOTODIODE indicator on the front of the Model 3955 electronics module. 1. Refer to Table 6-1 and verify the correct photodiode board is installed for the wavelength you are using. The assembly part number is located in the lower left comer below the photodiode (Figure 6-1 1). If the correct board is installed, skip to step 3. Photodiode PC Board rt- - - - -11 J3 1 I----- 16 I-----, 3930 C_RI J 1 --- [,-\I @ :-;.------. I\ ,I [Number( 1-= i I I I 3955 I I --- .------a 1,-\1 I\ ,I J Top View J2 Photodiode J1 Connect Side View Figure 6-11: Photodiode PC board
Alignment Table 6-1: Photodiode Part Numbers Assembly Part Number 0448- 1420 0448-3910 Wavelength (A) < 900 nm > 900 nm 2. Change the pc board. Test for Proper Mode Locking a. Turn off the Model 3955 electronics module. b. Remove the two mounting screws, then gently raise the pc board off the mount. Be careful, there are still three cables connected to it. Do not lose the five (5) washers. c. Remove the plug from J1, then unscrew and remove the cables from J2 and J3. Note which cable goes to which connector. Set the pc board aside. d. Install the appropriate pc board by reattaching the cables and replacing the screws. Refer to Figure 6-11 for the correct placement of cables and washers. Leave the screws loose. e. Verify the cables to J2 and J3 are attached to their respective BNC connectors on the input bezel (Figure 6-11 and Figure 4-1). f. Turn on the Model 3955 electronics module. 3. Loosen the two photodiode pc board mounting screws if you have not already done so, and move the board around until a maximum signal is observed on the PHOTODIODE bar graph on the front of the Model 3955, then tighten the mounting screws. This completes the alignment of the photodiode pc board. Continue with "Test for Proper Mode Locking." This following procedure assures good cavity performance and tests whether or not an alignment of the AOM in the next section is necessary. 1. If not already on, turn on the Model 3955 electronics module and push the STATUS mode locker enable button. The ENABLE LED will light. If you just turned on the Model 3955, allow about 20 minutes for the heaters and electronics to reach operating temperature. The two TEM- PERATURE indicators on the laser control panel will turn from red to green when the heaters stabilize. Aflashing red GTI TEMPERATURE indicator means either (a) the GTI is not installed or (b) there is a cable problem. Note: a flashing indicator is normal for a fs laser because there is no GTI. 2. Set up an autocorrelator to measure the Tsunami output pulse width.
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Tsunami Mode-locked Ti: sapphire La
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Table of Contents ... Preface .....
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Table of Contents . Chapter 6: Alig
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Table of Contents Chapter 10: Optio
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Table of Contents Figure 4-7: Typic
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Table of Contents Figure A-6: The f
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Warning Conventions The following w
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List of Abbreviations Used in this
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Tsunami Figure 1-1: The Tsunami Las
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Chapter 2 Laser Safety DANGER The T
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Laser Safety CA UTlON Use of contro
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1 1 1 Il I 11 I I 1 El l11111II~Ill
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Chapter 3 Laser Description General
Page 33 and 34: Laser Description growth techniques
Page 35 and 36: Laser Description - AOM OC n Fast P
Page 37 and 38: Laser Description 2.4 - 2.2 - 2.0 -
Page 39 and 40: I IIIIIN III I I 1 I 11111 i~ I I I
Page 41 and 42: I II li I I I i 1 il I 1 11 I 1 1 1
Page 43: I Laser Description . Outline Dimen
Page 46 and 47: Tsunami Input Bezel Connections The
Page 48 and 49: Tsunami Opto-Mechanical Controls Al
Page 50 and 51: Tsunami Blue Knob: Vertical Adjust
Page 52 and 53: ~lpl~ f \ Tsunami Opto-Mechanical C
Page 54 and 55: Tsunami Figure 4-7: 'Qpical MONITOR
Page 56 and 57: Tsunami r @ Spectra-Physics - - 4 2
Page 58 and 59: Tsunami Laser Installation Installi
Page 60 and 61: Tsunami Setting up the Routing Mirr
Page 62 and 63: Tsunami Aligning the Tsunami Laser
Page 64 and 65: Tsunami A -----------. PHOTODIODE O
Page 66 and 67: Tsunami Removing the Purge Line fro
Page 68 and 69: Tsunami Motorized Mount "Dm-shaped
Page 70 and 71: Tsunami I I J3 3930 - - - #,-,I --J
Page 72 and 73: Tsunami CA UTION DO NOT remove or a
Page 74 and 75: Tsunami Refer to the tables at the
Page 76 and 77: Tsunami b. Move the stage by hand a
Page 78 and 79: Tsunami There will be one or two re
Page 80 and 81: Tsunami Figure 6-9: The Slit Contro
Page 82 and 83: Tsunami b. Place a white card with
Page 86 and 87: Tsunami To measure pulses, use a Sp
Page 88 and 89: Tsunami pulses, adjust the coarse c
Page 90 and 91: Tsunami Selecting, Installing, and
Page 92 and 93: Tsunami Unless you are certain the
Page 94 and 95: Tsunami Prism Translation Adjust Fi
Page 96 and 97: Tsunami i. Route the GTI heater cab
Page 98 and 99: Tsunami Figure 6-18: Pr1/Pr4 prisms
Page 100 and 101: Tsunami Converting Between fs and p
Page 102 and 103: Tsunami b. Using an ir viewer, adju
Page 104 and 105: Tsunami g. Open the shutter. 15. Al
Page 106 and 107: Tsunami 10. Move Prl and Pr4 into t
Page 108 and 109: Tsunami 21. Mode lock Tsunami. Refe
Page 110 and 111: I " n 3 1 ' ! ' I . I 8 8 8 " t 8 0
Page 112 and 113: Tsunami recommend using 99.999% pur
Page 114 and 115: Tsunami Mode Locking the Laser 6. W
Page 116 and 117: Tsunami - - - 710 nrn - - 790 nrn -
Page 118 and 119: 4 Tsunami Beam % 2 mm (0.08 in.) Pr
Page 120 and 121: Tsunami Table 7-1: Bi-fi Selection
Page 123 and 124: I I1 ! I : I I I ill 8 I !Il! I1I l
Page 125 and 126: Lok-to-Clock Electronics LEVEL cont
Page 127 and 128: Lok-to-Clock Electronics AOM M5f-4
Page 129 and 130: Lok-to-Clock Electronics Installing
Page 131 and 132: I I1 I i l l I iil 111 ,111 Ill ,il
Page 133 and 134: P Lok-to-Clock Electronics Model 20
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I 1 1 I 1~~~ 11 I 1 1 1 1 .III :ill
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Lok-to-Clock Electronics Figure 8-9
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I I1 I l I 1 bll Lok-to-Clock Elect
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Tsunami "Clean" is a relative descr
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Tsunami Figure 9-1: Drop and Drag M
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Tsunami With the exception of pump
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Tsunami On rare occasions, the lowe
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Tsunami 8. Open the pump laser shut
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Tsunami 7. Remove the screws (4) ho
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Tsunami DryJClean Flow Adjust Nitro
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Tsunami diode such as the Model 393
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€968-PEP0 ES68-PEP0 PS68-PEP0 ES6
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Tsunami Check marks indicate which
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Tsunami Table 10-11: GTI and Bi-Pi
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Tsunami Generic Troubleshooting (No
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Tsunami Symptom: Laser will not mod
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Tsunami Symptom: Unable to mode loc
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Tsunami Symptom: Unable to mode loc
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Tsunami Symptom: Cannot see individ
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Tsunami Symptom: PZT oscillates whe
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I I ill ; I l l I I lll.l1 I I I *
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I I 111 il I iil i lllill ll I I ll
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I I il : I I I 1 I Appendix A Mode
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Mode Locking is chosen to be the sa
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I I 0 I I 1 I )I Ulllllll ill I Mod
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Mode Locking SPM will, thus, broade
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Mode Locking The net intracavity GV
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Appendix B Pulse Width Measurement
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I I 0 I I 1 1 LI I lillll Ill I!,ll
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Pulse Width Measurement -% GVD Comp
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I I I I I I I I ti 911 I1 I Pulse W
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I I I I I I B I IL 1 1 i 1111 I L I
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I I 0 I I 1 1 L I I Pulse Width Mea
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Appendix C Setting the Line Voltage
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Appendix D Material Safetv Data She
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Material Safety Data Sheets MATERIA
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I I I 1 r $1 I Bill II I I I I Ill
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Material Safety Data Sheets MATERIA
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