R&D (FilterCavity)
NaokiAritomi - 19:36, Thursday 29 July 2021 (2644)
Comment to CCFC on 20210720 (Click here to view original report: 2633)

Yuhang and Michael fitted this data with mcmc. The detuning fluctuation with mcmc is 8 Hz. The fit has been started from 60 Hz.

Left: mcmc (detuning: 59-67 Hz)

Right: least square (detuning: 51-69 Hz)

The following table shows the result of mcmc. The generated squeezing with mcmc is 9.0-10.2 dB, which correponds to the nonlinear gain of 3.6-4.5. This fluctuation seems too large.

detuning (Hz) homodyne angle (deg) generated squeezing (dB) loss (%)
58.7 +1.6/-2.5 -2.7 +0.5/-0.5  9.6 +0.3/-0.2 51.9 +0.8/-0.8
63.8 +0.5/-0.5 21.5 +0.1/-0.1 9.0 +0.05/-0.02 53.9 +0.1/-0.1
62.4 +0.7/-0.9 36.3 +0.3/-0.7 9.1 +0.1/-0.1 53.8 +0.2/-0.3
62.4 +1.4/-1.7 58.0 +1.3/-1.6 9.1 +0.2/-0.1 48.8 +1.6/-1.9
67.5 +1.4/-1.4 98.5 +1.5/-1.5 10.2 +0.2/-0.3 50.5 +2.5/-3.8
Images attached to this comment
2644_20210729123857_20210720mcmc.png 2644_20210729123906_ccfcfds20210720.png