We tried to recovered the fiber for PLL today. The status for each fiber port is like this(now main laser has power of around 700mW)

BS fiber one:

1. Main laser pick off for AUX1 PLL laser power (before fiber) is 3.8mW. This mean roughly the power ration is 0.55%. Then we tried to couple light into fiber, we achieved the couple around 53%.

2. AUX1 pick off laser power (before fiber) is 8.11mW. This means the power ratio is 1.6%. The couple we recovered is 57%.

BS fiber two:

1. Main laser pick off for AUX2 PLL laser power (before fiber) is 3.25mW. The couple for this fiber we achieved only 25%.

2. AUX2 pick off laser power (before fiber) is 1.7mW. However, this couple no matter how we tried we achieved almost nothing.

So we guess this second fiber may be broken. There is still possibility that we need more alignment work.