Figure 3-4: Accessible Holes For Hr And Hm Cavity Mirror Adjustment - NORTHROP GRUMMAN Iklwa II TEM00 Service Manual

2. Before removing the access hole screws, clean the cover with TechniCloth
3. Use a 1/8" ball driver to make adjustments. Start with HM adjustments only.
4. The screws for the adjustments of the vertical tilt angle and the horizontal tilt
5. Make small adjustments to the horizontal angle of HM mirror and observe the
6. Once a maximum is found, adjust the vertical control of HM mirror to
7. If the laser output returns to original specifications, alignment is complete. If
8. Make small adjustments to the horizontal angle of HR mirror and observe the
9. Once a maximum is found, adjust the vertical control of HR mirror to
10. Repeat the alignment steps with both the HR and HM until there is no
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NOTE:
HR aligns the beam through the center of the diode module rod and should
never be moved. HM aligns the beam through the SHG crystal and may need to be
aligned occasionally.
III™ wipes and isopropyl alcohol. Remove screws.
A fine adjustment is a 1° or less rotation. A small adjustment is about a 2°
rotation. A coarse adjustment is 15° to 20° rotation. If coarse adjustments are
needed to obtain performance, reduce operating current by 2 A. Return to
normal operating current when making small and fine adjustments.
angle are illustrated in Figure 3-4.

Figure 3-4: Accessible Holes for HR and HM Cavity Mirror Adjustment

output power.
maximize power.
not, proceed to Step 8.
output power.
maximize power.
significant performance improvement.
Chapter 3: Tuning and Testing Procedures
42 Patara II and Iklwa II Service Manual