Tsunami - Beckman Institute Laser Resource Center

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Installation
4. Verify pump laser power is set to minimum and open its shutter. Do
not open the Tsunami laser shutter
5. Raise the body of the routing mirror closest to the pump laser so the
pump beam is centered on the mirror, then rotate the assembly so the
exit beam travels toward the center of the second routing mirror.
Tighten the height adjustment setscrew. This is a rough setting.
6. In the same manner, adjust the height of the second routing mirror so
the pump beam exiting the first mirror is centered on it and so its exit
beam travels toward the center of the Tsunami input window. Tighten
the height adjustment setscrew. This is, again, a rough setting.
7. Iterate between adjusting the horizontal and vertical controls on the
two routing mirrors until the pump beam is centered on each mirror
and on the Tsunami input window. When you are done, the pump
beam should be 14.5 cm above the table and parallel to it. The dust
tubes should be parallel to the table as well, with the beam centered
inside the tubes.
8. Close the pump laser shutter.
9. Enclose the pump beam.
The dust tubes help provide long-term stability and provide personal
safety against accidental exposure to direct pump beam radiation.
Refer to Figure 5-2.
a. Holding the mirror-to-mirror set of dust tubes, slide the two inner
tubes into each end of the larger outer tube, then hold the assembly
between the two routing mirror assemblies and slide the inner
tubes out and into each mirror mount.
You will feel some slight resistance as the tubes slide past the
white PTFE sealing rings inside the routing mirrors. Do not mistake
the sealing rings for end stops; push past them about 1 cm.
Do not allow the tube to touch the mirror inside.
b. In like manner, use two inner tubes and one outer tube to enclose
the beam between the Tsunami laser and its routing mirror.
c. Use one inner tube and one outer tube to enclose the beam
between the pump laser and its routing mirror. The inner tube
slides into the routing mirror, the outer tube slides over the
BeamLok output snout.
CAUTION
Verify the dust tubes are parallel to the table and that they slide freely
inside one another and inside the mirror assemblies: any restriction can
cause long-termstability problems. The tubes need to slide easily to
allow for expansion and contraction.
This completes the routing mirror installation.