Reports until 15:31, Friday 12 August 2022
H1 SQZ
dhruva.ganapathy@LIGO.ORG - posted 15:31, Friday 12 August 2022 (64464)
OPO re-characterized at new crystal position

I re-took the OPO characterization measurements that were taken in June (see log) with hopes that the new crystal position is somewhat better for us. Unfortunately, it looks like after the intiial degradation of the crystal, the NLG vs Trans relation looks almost exactly the same as the previous measurement and there has been no overall improvement. However, we do see a bit more NLG for the same amount of OPO fiber launch power. Instead of hitting threshold at 25.5mW, we can expect to hit threshold at 24.5mW 

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