NaokiAritomi - 22:46, Thursday 07 November 2019 (1815)
Squeezing spectrum with new faraday
[Aritomi, Yuhang, Yaochin]
Today we installed new faraday (FI-1060-5SC-HP) between OPO and PBS to reduce back reflection from homodyne. Yaochin will report the detail. We measured frequency independent squeezing before/after installation of faraday. CC2 demodulation phase is as follows.
| CC2 demodulation phase for squeezing (deg) | CC2 demodulation phase for anti squeezing (deg) | |
| without faraday | 90 | 132 |
| with faraday | 105 | 155 |
Attached picture shows squeezing and anti squeezing spectrum with/without faraday. After installation of faraday, squeezing spectrum got amazingly better. Yuhang will report the phase noise measurement.
Images attached to this report
