Tsunami - Beckman Institute Laser Resource Center

More documents

Recommendations

Info

Tsunami Symptom: Laser will not mode lock (cont.) Possible Causes Optics are dirty. Chiller is not turned on. 3955 electronics module is not on. Model 3955 electronics are On' but the rf power is disabled. Photodiode and rf cable connections are switched. Cables from the Model 3955 electronics module are not installed, or are damaged. AOM, photodiode or GTI cables (ps only) are not connected, or are damaged. rf coarse and/or fine adjustment are not set correctly. AOM is misaligned. Photodiode is aligned. Corrective Action Inspect the optics for dirt or contamination. If dirty, clean the optics in the following order, using the cleaning procedure in chapter 9, "Maintenance." This list orders the optics by influence in power loss. If an optic is dirty, an ir viewer will show unusual scatter. 1. Input and output Brewster window surfaces 2. Prisms 3. Rod surfaces 4. Bi-fi (ps configuration), outside surfaces only 5. PI, P2 6. M3 (both surfaces) 7. M2 8. M41 M5 9. M7, M8 10. Ms, M'J 11. Ml0, M1 12. AOM 13. Beam splitter (highly unlikely it will need cleaning) Turn on the chiller. Turn on the electronics module. If the power indicator does not light, check the fuse or power connection. It takes about 20 min. for the Model 3955 to warm UP. Enable rf power by pressing the STATUS mode locker enable button on the front panel of the electronics module. Verify the cables are connected correctly. If connections were reversed, circuit damage might have occurred on the photodiode pc board. Refer to chapter 5, "Installation: Installing the Tsunami Model 3955 Electronics Module." Verify the cables are installed and secure. If damaged, replace the cable(s). Refer to chapter 5, "lnstallation," for installation instructions and to chapter 6, "Alignment: Coarse Phase Adjustment ..." for more information regarding cable replacement. Verify the cables are installed correctly and are secure. Refer to chapter 5, "lnstallation." Replace any damaged cable(s). Adjust the fine PHASE control on the Model 3955 electronics module. If unsuccessful, refer to chapter 6, "Alignment: Coarse Phase Adjustment ..." for more information. Refer to chapter 6, "Alignment: Aligning the A10 Modulator (AOM)." properly Refer to chapter 6, 'Alignment: Aligning the Photodiode PC Board.''
Service and Repair Symptom: Unstable mode locking Possible Causes Possible Feedback Tsunami is not optimized. Poor beam mode profile. Improper phase adjustment. Optics are dirty. Corrective Action Feedback occurs when a reflection from a flat surface (such as a mirror, fiber, or the plano surface of a lens) enters the laser cavity. Feedback radiation of a few mW may disrupt mode locking. To test for possible feedback, set up a fast photodiode (or the Model 409 autocorrelator) to monitor the Tsunami pulse using a beam splitter between the Tsunami and the suspected feedback source. If stable pulse operation is obtained after blocking the beam to the suspected source, you have a feedback problem. Try realigning the suspected device to the Tsunami laser. If this does not work, try installing a Faraday or other isolator in your optical system. When selecting an isolator, be sure it can accommodate the Tsunami wavelength tuning range. Refer to chapter 7, "Operation: Optimizing Laser Output." With the beam directed to far field (e.g., displayed on a wall), adjust M2 to obtain a solid, slightly elliptical mode with high contrast. There should be no spikes on the outer edges of the beam profile. Press the STATUS mode locker enable button on the Model 3955. lncrease the gain on the autocorrelator and angle-tune the doubling crystal to search for the autocorrelator signal. Adjust the fine PHASE control for the highest signal, then adjust the GTI POSITION control to obtain the pulse. If there is no noticeable change in the autocorrelator signal, center the PHASE LED display using the PHASE fine control. Increase the autocorrelator signal by adjusting the coarse phase control inside the Model 3955 (refer to "Coarse Phase Adjustment ..." in chapter 6). Test for proper mode locking (refer to "Test for Proper Mode Locking" in chapter 6). Lower the pump power and repeat the above if a pulse still does not appear. Inspect the optics for dirt or contamination. If dirty, clean the optics in the following order, using the cleaning procedure in chapter 9, "Maintenance." This list orders the optics by influence in power loss. If an optic is dirty, an ir viewer will show unusual scatter. 1. Input and output Brewster window surfaces 2. Prisms 3. Rod surfaces 4. Bi-fi (ps configuration), outside surfaces only 5. PI, PP 6. M3 (both surfaces) 7. M2 8. M4, M5 9. M7, M8 10. M6, Mg 11. 4 0 7 M1 12. AOM 13. Beam splitter (highly unlikely it will need cleaning)
Page 1:
Tsunami Mode-locked Ti: sapphire La
Page 5 and 6:
Table of Contents ... Preface .....
Page 7 and 8:
Table of Contents . Chapter 6: Alig
Page 9 and 10:
Table of Contents Chapter 10: Optio
Page 11 and 12:
Table of Contents Figure 4-7: Typic
Page 13 and 14:
Table of Contents Figure A-6: The f
Page 15:
Warning Conventions The following w
Page 19:
List of Abbreviations Used in this
Page 22 and 23:
Tsunami Figure 1-1: The Tsunami Las
Page 25 and 26:
Chapter 2 Laser Safety DANGER The T
Page 27 and 28:
Laser Safety CA UTlON Use of contro
Page 29 and 30:
1 1 1 Il I 11 I I 1 El l11111II~Ill
Page 31 and 32:
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 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 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
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 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 and 180: I I 111 il I iil i lllill ll I I ll
Page 181 and 182: I I il : I I I 1 I Appendix A Mode
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
show all

Tsunami - Beckman Institute Laser Resource Center

Create successful ePaper yourself

Delete template?

Save as template?