Tsunami - Beckman Institute Laser Resource Center

Tsunami
10. Move Prl and Pr4 into the beam path.
a. Loosen the dovetail setscrew on each prism dovetail mount
(Figure 6- 16).
b. Use a hex ball driver to adjust the screw on the mount exactly 10
turns counterclockwise to move the prism into the beam path.
You need to be exact in your turns because, when you convert the
laser for ps operation again, you will back the prisms out exactly
10 turns.
Small holes in the beam shields provide access to the drive screw.
c. Tighten the setscrews. Do not over-tighten.
11. Place a white card about 10 cm outside the output window and use an ir
viewer to see the fluorescent image.
12. Adjust M5 to direct the fluorescence through the prism sequence and
out the laser.
13. Align MlO.
a. Place a white card with a 5 mm diameter hole in it between M4
and M5 SO the hole is centered on the reflected fluorescent image
from M4.
b. Adjust MI0 vertically and horizontally to direct the reflected
image from Mi 0 back through the hole in the card and overlap it
with the image coming from M4.
To determine which reflected image comes from Ml0, watch the
M5 side of the card and slightly adjust Ml0 until you see which
image moves.
c. Remove the card and lasing should begin.
d. Adjust M1 and Mlo to optimize Tsunami output power.
14. Close the shutter and remove the bi-fi.
a. Turn the bi-fi micrometer fully clockwise.
b. Loosen the setscrew on the bi-fi mount holding the filter
(Figure 6-3), and carefully lift the filter out. Store the filter in a
safe, clean place.
15. Remove Mlo and replace it with the appropriate optic for ps operation.
Refer to the optics tables in chapter 10.
Mlo is held in place by a screw-in holder. Unscrew the holder and the
mirror will come out with it.
a. Reach in from both sides of the Ml0 mount and unscrew the
knurled mirror holder of the output coupler (Figure 6-12).