[Aritomi, Eleonora P.]

We checked error signal of OPO reflection with new PD. Attached picture shows error signal of OPO reflection. The amplitude is 112 mVpp as expected.

As you can see from second attached picture, error signal of OPO reflection (and its control loop) is not stable mainly because CC PLL lock is not stable.

CC PLL lock should be checked.

Also we need to optimize the control filter.