Reports until 15:51, Thursday 03 October 2024
H1 SQZ
camilla.compton@LIGO.ORG - posted 15:51, Thursday 03 October 2024 (80451)
Translated OPO Crystal to new spot to Reduce Losses

Sheila, Camilla. WP 1211612117. Last done in October 2023: 73524.

Followed instructions from 7352465684, with additional notes below. 

Took SQZT7 area to local laser hazard and plugged straight into the OPO_IR_PD for our red signal and the OPO_TRANS PD for our green signal. Trying to take the signals from the outside of the table or the SQZ racks was confusing. 

Setup:

What we did:

Today, 75uW OPO trans power corresponded to 0.945 on the OPO refl diode, last night that was 4.161mW on OPO refl diode. Meaning after this spot move we now need to inject a lot less power into the OPO to get the same output power.

Images attached to this report