Tsunami - Beckman Institute Laser Resource Center

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Tsunami Mode-Locked Ti:sapphire Laser Service Centers (cont.) United Kingdom Spectra-Physics Ltd. Boundary Way Heme1 Hempstead Herts, HP2 7SH Telephone: (44) 1442-258100 Fax: (44) 1442-68538 United States and Export countries* Spectra-Physics 1330 Terra Bella Avenue Mountain View, CA 94043 Telephone: (800) 456-2552 (Service) or (800) SPL-LASER (Sales) or (800) 775-5273 (Sales) or (650) 961-2550 (Operator) Fax: (650) 964-3584 e-mail: service@ splasers.com sales @ splasers.com Internet: www.spectra-physics.com *And all countries not included elsewhere on this list.
I I il : I I I 1 I Appendix A Mode Locking General In this chapter, we provide a brief discussion of mode locking and the regenerative mode locking technique employed in the Tsunami laser. A description of the group velocity dispersion (GVD) found within the cavity is also presented, and the role of nonlinear effects (due to intense pulses passing through the gain medium) is considered. Finally, GVD compensation techniques employed within the Tsunami are discussed since they ultimately determine the output pulse width. In any laser system, the allowed oscillating wavelengths (or frequencies) are determined by two factors: the longitudinal modes determined by the laser cavity (subject to threshold conditions) and the gain-bandwidth of the laser medium. In a laser cavity, the electric field of the oscillating optical frequencies must repeat itself after one round-trip; i.e., the oscillating wavelengths must satisfy a standing wave condition in the laser cavity or an integral number of half-wavelengths must exactly fit between the end mirrors. The small group of frequencies that satisfy this condition are the longitudinal modes of the laser. The gain-bandwidth of the laser medium is determined by its atomic or molecular energy levels. Atomic gas lasers tend to have relatively narrow bandwidth, while molecular dye and solid state systems exhibit broader bandwidth. In a cw or free-running laser, the longitudinal modes operate independently. Cavity perturbations cause some modes to stop oscillating and when they re-start they have a different phase. Thus, the laser output comprises various randomly phased mode frequencies. In a mode-locked laser, the longitudinal modes must be "locked" in phase, such that they constructively interfere at some point in the cavity and destructively interfere elsewhere in order to create a single circulating pulse. Each time this intracavity pulse reaches the partially reflective output coupler, an output pulse is produced. The time between the output pulses is the time it takes for the cavity pulse to make one complete round trip. For a Tsunami system, this corresponds to about 12.2 ns. The output pulse frequency, or repetition rate (rep rate), is 82 MHz (refer to Figure A-1).
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Tsunami Mode-locked Ti: sapphire La
Page 5 and 6:
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
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Tsunami Refer to the tables at the
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Tsunami b. Move the stage by hand a
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Tsunami There will be one or two re
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Tsunami Figure 6-9: The Slit Contro
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Tsunami b. Place a white card with
Page 84 and 85:
Tsunami Aligning the Photodiode PC
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Tsunami To measure pulses, use a Sp
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Tsunami pulses, adjust the coarse c
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Tsunami Selecting, Installing, and
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Tsunami Unless you are certain the
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Tsunami Prism Translation Adjust Fi
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Tsunami i. Route the GTI heater cab
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Tsunami Figure 6-18: Pr1/Pr4 prisms
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Tsunami Converting Between fs and p
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Tsunami b. Using an ir viewer, adju
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Tsunami g. Open the shutter. 15. Al
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Tsunami 10. Move Prl and Pr4 into t
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Tsunami 21. Mode lock Tsunami. Refe
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I " n 3 1 ' ! ' I . I 8 8 8 " t 8 0
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Tsunami recommend using 99.999% pur
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Tsunami Mode Locking the Laser 6. W
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Tsunami - - - 710 nrn - - 790 nrn -
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4 Tsunami Beam % 2 mm (0.08 in.) Pr
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Tsunami Table 7-1: Bi-fi Selection
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I I1 ! I : I I I ill 8 I !Il! I1I l
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Lok-to-Clock Electronics LEVEL cont
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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
Page 174 and 175: Tsunami Symptom: PZT oscillates whe
Page 177 and 178: I I ill ; I l l I I lll.l1 I I I *
Page 179: I I 111 il I iil i lllill ll I I ll
Page 183 and 184: Mode Locking is chosen to be the sa
Page 185 and 186: I I 0 I I 1 I )I Ulllllll ill I Mod
Page 187 and 188: Mode Locking SPM will, thus, broade
Page 189 and 190: Mode Locking The net intracavity GV
Page 191 and 192: Appendix B Pulse Width Measurement
Page 193 and 194: I I 0 I I 1 1 LI I lillll Ill I!,ll
Page 195 and 196: Pulse Width Measurement -% GVD Comp
Page 197 and 198: I I I I I I I I ti 911 I1 I Pulse W
Page 199 and 200: I I I I I I B I IL 1 1 i 1111 I L I
Page 201 and 202: I I 0 I I 1 1 L I I Pulse Width Mea
Page 203 and 204: Appendix C Setting the Line Voltage
Page 205 and 206: Appendix D Material Safetv Data She
Page 207 and 208: Material Safety Data Sheets MATERIA
Page 209 and 210: I I I 1 r $1 I Bill II I I I I Ill
Page 211 and 212: Material Safety Data Sheets MATERIA
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Tsunami - Beckman Institute Laser Resource Center

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