Yuhang, Eleonora

We changed the BS used to split the reflection of green FI FC lock PD and QPDs.

Before we were using a BS T 10 (70:30 for s-pol) and we replaced it with a BS X 10 (90:10 for s-pol).

Note that we are using p-pol so the actual ratios are different.

In the previous configuration we had 2 OD (0.5 and 0.6). Now we use only one OD (0.6) and the power is ~0.35 mW and the power reacing the pd is ~150 uW

We need to check FC PDH signal.