Tsunami - Beckman Institute Laser Resource Center

More documents

Recommendations

Info

Tsunami 21. Mode lock Tsunami. Refer to chapter 7, "Operation: Mode Locking the Laser." This completes the ps to fs conversion. Coarse Phase Adjustment and Changing the rf and Photodiode Cables CAUTION It is critical to system performance that you use the rf and photodiode cables provided with the Model 3955. The system was calibrated for the type and length of these cables. Ifrf and/or photodiode cables other than those shipped with the Tsunami laser are used, follow the procedure below to adjust for the difference in cables. If the cables used to connect the photodiode and rf signals are other than those shipped with the unit, a coarse phase adjustment might be required to compensate for any change in cable length. Before this adjustment can be made, your Tsunami must be lasing and a photodiode and/or autocorrelator and oscilloscope set up to detect pulses. Refer to your autocorrelator instruction manual for directions on its setup and use. /I - When the Tsunami laser is oscillating at about 80 MHz, an output pulse is produced approximately every 12 ns. The fine PHASE control on the front panel provides a 100 ps delay to provide proper mode locker adjustment in most cases. However, by changing cables, you change the delay of the loop and can easily move the delay outside the limits of this control. The coarse control inside the Model 3955 provides about 14 ns delay and can be adjusted so the fine PHASE control is once again effective. 1. See if Tsunami is creating short output pulses. Look for a short output pulse (80 fs or 2 ps, depending on laser configuration) when the mode locker is enabled (ENABLE is illuminated on the STATUS panel of the Model 3955 electronics). If short pulses are present, the laser is aligned and properly mode locked and you are done. If the pulses are broader than specified for your configuration, proceed. 2. Remove the cover (4 screws) from the Model 3955 electronics module.
1 1 1 1 ' , il i l l 1 1 I Alignment DANGER: HIGH VOLTAGE AND CURRENT Removing the cover exposes high voltage and current. Do not attempt repairs or alterations other than for those expressly outlined in these instructions. Otherwise, you may be harmed or the unit damaged. Such damage is not covered by your warranty. 3. Set the fine PHASE control to its center of rotation (the center bar of the PHASE indicator will be lit). 4. Locate the large, white, coarse control knob on the pc board and note its setting in case you wish to return to it later. 5. Turn the coarse control knob until an autocorrelation signal appears on the oscilloscope, then adjust for maximum signal. This matches the phase of the mode locker electronics to the actual pulse. 6. Refer to "Aligning the A10 Modulator (AOM)" earlier in this chapter for information on tuning the modulator for short pulses. 7. Test for proper mode locking. Refer to "Test for Proper Mode Locking" earlier in this chapter for information on verifying stable mode-locked operation. Note: if you are running in the long wavelength range, block the incoming ion laser beam instead of opening the laser head to perform this test. Removing the cover introduces water vapor into the cavity which can severely compromise performance in this range. It can take some time before the purge is again effective. Refer to "System Startup" in chapter 7. 8. Replace the cover and screws. Do not leave the cover ofJ: This completes the coarse phase adjustment.
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 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 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 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

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?