1. Alignment check of the IO
The original angle reads of the wave plates were 316deg and 38.0deg for the QWP and HWP, respectively.
The beam power before the EOM was 284mW.
At the last state, with the angle of 318.2deg and 33.7deg, the power of 284mW reached the EOM.
After the adjustment the power after the EOM was 274mW. The transmission efficiency of 96.5% sounds pretty fine.
2. RF leakage investigation
3. RFAM adjustment
4. Power supply AC path