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2.2.5 Fine Mirror Alignment
1. Turn the host laser to low energy, long pulse operation.
2. Turn the Control Switch and Key Switch on the injection seeder to ON. The emission indicator
light should turn on. Confirm that there is output at the seeder with an IR card.
3. Using an IR card or viewer, alternately observe the seed beam and host laser beam. Adjust
mirrors #1 and #2 until the seed beam is centered on the output coupler. Make adjusts in
small increments so as not to completely loose the seed beam., If the seed beam is not
visible return to Section 2..
4. Switch the host laser to normal, short pulse, full energy Q-switch operation.
5. Using an oscilloscope, observe the Q-switch build-up reduction time as described in Section 3.4.
Allow the host laser at least 30 minutes of operation at normal temperatures before
proceeding.
6. Maximize the Q-switched build-up reduction time by adjusting mirrors #1 and #2. Since the
host and seed beams should overlap, the mirrors should not require substantial realignment.
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