YuhangZhao - 13:56, Wednesday 13 April 2022 (2926)
Squeezing level and CC2 signal pk-pk as a function of CC2 demodulation phase
Michael and Yuhang
As suggested by Matteo, we took squeezing level and CC2 signal magnitude as a function of CC2 demodulation phase.
They are both normalized, either by shot noise level or CC2 signal without pump.
Fig 1 is squeezing measurements at different CC2 demodulation phase. The phase is changed as linspace(0, 180, 19). It is not understood why sometimes some peaks appear around 5-20kHz.
Fig 2 is squeezing and CC2 signal magnitude as a function of CC2 demodulation phase.
Images attached to this report
Comments related to this report
Similar measurement was done in elog2646. In this measurement, the minimum(maximum) CC2 amplitude did not correspond to squeezing(anti-squeezing) quadrature.