nutsinee.kijbunchoo@LIGO.ORG - posted 22:07, Wednesday 11 January 2023 - last comment - 11:02, Friday 13 January 2023(66765)
Squeezer 5 kHz line resolved
Daniel Nutsinee
Long story short. The picomoters were left on. Daniel turned them off. Line disppeared.
The frequency of these lines changed as we selected different picomotors. This explained why we had 3 kHz line before and 5 kHz line now.
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The broad noise bump above 500Hz is due frequency noise of the squeezer laser. This noise is insufficiently suppressede due our current inability to turn on the EOM path in the TTFSS because of the 2.5MHz line in the PSL frequency servo, see alog 65359 and related.