Nishino,

2024.10.31 (see mainOLTF_retake/OLTF_retake.ipynb)

I characterized the GR locking loop. UGF is 7.0 kHz with the phase margin of ~30 degrees.

Figures:

1) Open loop transfer function (G)

2) Filters of SR560 and Moku PID controller (F)

3) G/F=AH, A: PZT actuator efficiency, H: optical gain

4-7) Settings of Moku low pass, fast, slow controller and SR560