New Wave Research Tempest - Figure 4-5: Second Harmonic Waveplate Optimization; Figure 4-6: Second Harmonic Angle Adjustment

Operation
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3) Install the 532 nm dichroic separation mirrors using the alignment
pins and screw holes closest to the beam exit.
4) Turn the laser on at low energy to ensure that the beam is passing
through the center of the SHG crystal. Increase the lamp voltage to
increase the SHG energy.
5) Release the half wave plate set screw on the top of the second
harmonic generator housing, Figure 4-5. Rotate the half wave plate
to maximize the green energy (532 nm) output.
Figure 4-5: Second harmonic Waveplate Optimization
6) Rotate the second harmonic generator crystal to optimize the phase
matching angle and maximize the 532 nm energy. The crystal angle
may be adjusted using a trim pot adjustment tool or small
screwdriver, Figure 4-6.
Figure 4-6: Second harmonic Angle Adjustment
Angle adjustment
screw
Waveplate
locking screw
Waveplate