Tsunami Mode-Locked Ti:sapphire Laser
9-10
3. Wearing clean gloves or finger cots, clean each mirror surface using
the “drop and drag” method outlined in Step 2 of “General Procedures
for Cleaning Optics.”
4. After each mirror is cleaned, screw the mirror holder back in place.
Take care not to cross-thread the holder.
5. Open the pump laser shutter and adjust the optic just cleaned for maxi-
mum output power.
6. Close the pump laser shutter again before removing the next mirror.
Continue in this manner until either specified power is reached, or all the
optics are clean.
GTI (ps configuration)
1. Close the pump laser shutter.
2. Remove the GTI for cleaning. Clean the exposed optic using a folded
tissue and hemostat as described in Step 3 of “General Procedure for
Cleaning Optics.”
3. Open the pump laser shutter and adjust the GTI vertically and horizon-
tally for maximum output power.
A/O Modulator (AOM)
The AOM is a very delicate, electrical acousto-optic device, and must be
disconnected from the laser head pc board and removed from the laser head
for cleaning. Do not clean it unless absolutely necessary.
1. Close the pump laser shutter.
2. Turn off the Model 3955 electronics.
3. Disconnect the SMA cable from the top of the AOM SMA connector
(Figure 9-4) by unscrewing it.
4. Remove the cover to the laser head pc board (3 screws).
5. Disconnect the AOM heater cable from the J
3
connector on the laser
head pc board.
6. Loosen the mounting setscrews (2) at the base of the AOM and care-
fully slide the modulator from its mount.
Do not disassemble the GTI for cleaning. You will damage it and void
the warranty. If internal contamination is evident, contact your Spectra-
Physics service representative.
Warning!
The pc board on the floor of the laser head contains high voltage to drive
the GTI (ps configuration). Turn off the Model 3955 electronics module
to disable this board.
Danger!
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