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Reports until 21:54, Monday 04 November 2019
H1 SQZ (SQZ)
nutsinee.kijbunchoo@LIGO.ORG - posted 21:54, Monday 04 November 2019 (52988)
Several SQZ/ASQZ measurements with the homodyne. *Maybe* keep an eye on the crystal degradation

Here I compiled several days worth of sqz/asqz measurements with the homodyne in one plot. Everytime I make a measurement I get slightly more and more loss infer from antisqueeze. This could be an indication that our crystal is slowly degrading. However, it is also possible that I have a large uncertainty in the nonlinear gain measurement so it's difficult to draw a solid conclusion from the data taken during the past few days. It is true though that we used to have a threshold power of 18mW. Something to keep an eye out for.

 

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