1. The laser power MON for PMC output (IMC input) was fixed. See, the first picture.
2. The used PD is the DCPD at RAMMON. The gain is 20dB. There is the set of HWP and TFP [1] before the DCPD and RAMMON (RFPD), and we noticed that the TFP was not responding to the polarization change by the HWP. Probably the incident angle of 45 deg is very severe, and we couldn't make it work as the power adjuster. Therefore it was replaced to a cubic PBS, see the latter two pictures.
[1] CVI TFPN-1064-PW-1025-UV, https://www.cvilaseroptics.com/file/general/8-Polarization_Components.pdf
