Tsunami - Beckman Institute Laser Resource Center

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Tsunami To ensure the Tsunami laser can be tuned over its wavelength range with a fixed repetition rate, it is necessary to have a coarse cavity length adjust- - ment in addition to the fine length control provided by the PZT-controlled M4 mirror. Thus, mirror MI is mounted on a motorized micrometer and controlled through upldown buttons on the Model 3930. The MI control is a manual coarse control, while M4 is an automatic fine control. A bar graph indicator on the Model 3930 indicates the relative position of M4. The electronics module also provides controls and indicators for setting and viewing the photodiode signal level and the reference frequency. A built-in 10 Hz sweep generator can be used to create a 2 ns phase shift in the Tsunami photodiode signal. This facilitates locating pulses when trying to lock the LTC Tsunami to another laser. System Controls The following describes the displays and controls on the front and rear panels of the Tsunami Model 3930 LTC electronics module. Front Panel TIMING coarselfine control-sets timing between the reference source and the Tsunami laser. Both the coarse (outer knob) and fine (inner knob) controls have a 10-turn resolution. Range for the coarse control is approximately 2 ns; it is 100 ps for the fine control. When the sweep generator (see below) is off, the coarselfine controls set the timing reference; when I - the sweep generator is on, the coarselfine controls are disabled. TIMING sweep generator onfoff push button-toggles the triangle wave sweep generator on and off (default = off). The sweep runs at about 10 Hz, and produces a linear timing change of about 2 ns. When the generator is off, the coarselfine controls set the timing reference; when on, the coarse1 fine controls are disabled. LEVEL indicator-displays relative photodiode signal strength with full-scale = maximum signal. This is an uncalibrated reference indicator. f , LEVEL FREQUENCY STATUS @ Spectra-Physics 'I Figure 8-2: Model 3930 Electronics Module Front Panel Controls and Indicators
Lok-to-Clock Electronics LEVEL control-allows you to adjust the photodiode input signal gain. This control is typically fully clockwise (full on). FREQUENCY: SELECT button-sets the frequency display to show either the reference frequency (REF-internal or an external reference source), the actual laser pulse frequency (LSR), or the difference between the two (DIF). FREQUENCY: REF indicator-indicates the system reference frequency is displayed on the frequency display panel. FREQUENCY: LSR indicator-indicates the actual laser frequency, as measured by the Tsunami laser photodiode output, is displayed on the frequency display panel. FREQUENCY: DIF indicator-indicates the difference between the reference frequency and actual laser pulse frequency is displayed on the frequency display panel. FREQUENCY display panel-an 8-digit LED panel that displays either an internal or external reference frequency (REF), the actual laser pulse frequency (LSR), or the difference between the two (DIF). Frequency is shown in MHz to the nearest 10 Hz. The display has a 1 Hz refresh rate. FREQUENCY up/down push buttons-increases or decreases the laser repetition rate by adjusting the laser cavity length, i.e., the position of MI. STATUS indicator-a bar display that, when lit, shows the relative position of the M4 PZT mirror within its range. When no segments are lit, the Lok-to-Clock function has been disengaged via the STATUS: LOCK button. STATUS: LOCK push button-toggles the Lok-to-Clock PLL circuit on and off. When on, one or two segments of the STATUS bar display are lit. POWER: ON indicator-indicates power is applied to the Model 3930 electronics module. Rear Panel Power cord connector--connector for a standard line cord to attach the Tsunami electronics to facility line power. Power switch-turns power on and off to the Model 3930. It is located next to the power cord connector. Voltage select switch-provides the means to match the electronics input power to your local line voltage. Input voltage selections are 100, 120, 220, and 240 V,,. Appendix C describes how to set the switch and select the fuse rating for your location. TO HEAD main signal D-sub connector (25-pin female)--connects to the female 25-pin TO 3930 connector on the Tsunami laser head input bezel.
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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
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Laser Description growth techniques
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Laser Description - AOM OC n Fast P
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Laser Description 2.4 - 2.2 - 2.0 -
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I IIIIIN III I I 1 I 11111 i~ I I I
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I II li I I I i 1 il I 1 11 I 1 1 1
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I Laser Description . Outline Dimen
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Tsunami Input Bezel Connections The
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Tsunami Opto-Mechanical Controls Al
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Tsunami Blue Knob: Vertical Adjust
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~lpl~ f \ Tsunami Opto-Mechanical C
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Tsunami Figure 4-7: 'Qpical MONITOR
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Tsunami r @ Spectra-Physics - - 4 2
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Tsunami Laser Installation Installi
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Tsunami Setting up the Routing Mirr
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Tsunami Aligning the Tsunami Laser
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Tsunami A -----------. PHOTODIODE O
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Tsunami Removing the Purge Line fro
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Tsunami Motorized Mount "Dm-shaped
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Tsunami I I J3 3930 - - - #,-,I --J
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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 84 and 85: Tsunami Aligning the Photodiode PC
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: I I1 ! I : I I I ill 8 I !Il! I1I l
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
Page 135 and 136: I 1 1 I 1~~~ 11 I 1 1 1 1 .III :ill
Page 137 and 138: Lok-to-Clock Electronics Figure 8-9
Page 139: I I1 I l I 1 bll Lok-to-Clock Elect
Page 142 and 143: Tsunami "Clean" is a relative descr
Page 144 and 145: Tsunami Figure 9-1: Drop and Drag M
Page 146 and 147: Tsunami With the exception of pump
Page 148 and 149: Tsunami On rare occasions, the lowe
Page 150 and 151: Tsunami 8. Open the pump laser shut
Page 152 and 153: Tsunami 7. Remove the screws (4) ho
Page 154 and 155: Tsunami DryJClean Flow Adjust Nitro
Page 156 and 157: Tsunami diode such as the Model 393
Page 158 and 159: €968-PEP0 ES68-PEP0 PS68-PEP0 ES6
Page 160 and 161: Tsunami Check marks indicate which
Page 162 and 163: Tsunami Table 10-11: GTI and Bi-Pi
Page 164 and 165: Tsunami Generic Troubleshooting (No
Page 166 and 167: Tsunami Symptom: Laser will not mod
Page 168 and 169: Tsunami Symptom: Unable to mode loc
Page 170 and 171: Tsunami Symptom: Unable to mode loc
Page 172 and 173: 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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Tsunami - Beckman Institute Laser Resource Center

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