Aritomi, EleonoraP, Yuhang

As described in the title, we characterized more about coherent control loop 1.

The dark noise is measured when there is not light. And other situation is the same(for example, PD is on, demodulation signal is on). The measurement point is error signal.

The free running error signal noise spectrum is measured after we checked that green phased shifter scanning and coherent error signal was fine.