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First Relay Mirror - far (fiber) alignment
Plano Mirror - near (wedge) alignment
3.2.2.3 Resonator Alignment
1. Remove the optics bench cover.
2. Examine the optics for any visual sign of damage. Replace damaged HR, OC, or Relay mirrors.
(Refer to Fig 3.4 on the previous page) To replace a channel relay mirror, HR or OC, first remove the
mirror mount by carefully removing the mounting screw (it has a spring around its shaft to place ten-
sion on the mount) while supporting the mount. Once the mount is free, set it down face up and
remove the retainer (held in place by three hex screws) that hold the optic. The old optic can then be
removed and the new optic inserted (ball bearings inside the mounting hole center and the optic in the
hole). Reinstall the retainer, then the mirror mount. Note that the mount should return to its former
position, since the adjustment screws were not removed.
3. Examine the end of the rod for visual damage.
The rod will be illuminated by the flash lamp when the unit is on (if not, the flash lamp has failed or
the simmer supply circuitry has a problem). Replace a damaged rod or failed flash lamp.
4. Center and peak the cavity output into the first relay mirror.
When the cavity OC and HR are correctly aligned, the YAG beam will be centered in the relay mirror
directly across from the OC, and the cavity power output will be peaked.
a. Remove the first relay mirror mount and place a piece of "Zap-it" or Dioptron paper just in front of
where the first Relay Mirror was removed.
b. Set the laser in service mode with the following parameters:
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