R&D (FilterCavity)
MichaelPage - 23:29, Thursday 07 December 2023 (3370)
Green alignment to PR

I confirmed the alignment of the green AOM.

The (lower left on electronics rack) function generator outputs from channel 1: 109.036 035 615 MHz, 5 dBm voltage, to + 18 dB RF amp -> 23 dBm to AOM.

I reduced the main laser current from 1.833 to 1.750 to make the green power consistent with previous values of AOM green power. I confirmed the alignment of the first order diffracted beam from the AOM to the subsequent iris and the green is now hitting the PR tank targets.

SHG green out: 284 mW
AOM in: 48.8 mW
AOM out (RF on): 46.0 mW
AOM out (RF off): 45.2 mW
Iris out (RF on): 22.1 mW
Iris out (RF off): < 10 uW