Maintenance
9-9
6. Open the pump laser shutter and align the mirror vertically and hori-
zontally for maximum output power.
7. Replace the beam shield if you do not intend to clean M
3
.
Pump mirror P
2
is cleaned in the same manner as focus mirror M
2
below.
Focus Mirror M
3
and Output Coupler M
10
1. Close the pump laser shutter.
2. Reach in from both sides of the OC mount and unscrew the knurled M
10
mirror holder (Figure 9-4).
3. Wearing clean finger cots or gloves, hold the mirror by its barrel and
pull it from its holder.
4. Clean the output surface using the “drop and drag” method outlined in
Step 2 of “General Procedures for Cleaning Optics.”
5. Install the optic in its holder with the output surface facing into the
holder.
Press it in until the O-ring captures it. Do not press on its optical sur-
face.
6. Clean the cavity side in the same manner.
7. Screw the mirror holder into its mount.
Finger tight is sufficient.
8. Open the pump laser shutter, and adjust M
10
to restore maximum
power.
9. Close the pump laser shutter.
10. Remove and clean the M
3
focus mirror as you did M
10
, cleaning the
pump beam input surface first, then the intracavity surface.
11. Install the mirror holder into its mount.
12. Replace the beam shield removed for cleaning P
1
.
13. Open the pump laser shutter and adjust
M
3
vertically and horizontally
for maximum output power. Do not adjust the slide.
14. When M
3
is replaced, place a white card in front of M
5
, and adjust P
2
to
overlap the two fluorescent ovals so they form a cross-shaped image.
Then remove the white card and adjust
M
3
until the system lases.
15. Verify the laser beam is centered on mirrors
M
1
to M
5
, as well as M
10
.
Adjust the photodiode pc board if required (refer to the “Aligning the
Photodiode PC Board” in Chapter 6).
High Reflector M
1
, Focus Mirror M
2
,
Fold Mirrors
M
4
and M
5
, and Prism Mirrors M
6
to M
9
1. Close the pump laser shutter.
2. Remove each mirror, one at a time, starting at
M
1
and ending at M
9
(but
not
M
3
), but do not remove the element from its holder. Refer to Figure
4-3 and Figure 4-4.
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