KAGRA MIR (General)
SimonZeidler - 22:01, Thursday 16 September 2021 (2685)
Comment to birefringence imaging unit in transmission of flipping mirror (Click here to view original report: 2684)

Thanks a lot for the report.

I have some questions. What is the input power of the beam and wouldn't it be possible to further reduce that power by using the HWP right after the fiber-output?
In any case, I remember that we had to use several ND filters as well...

Regarding the power supply of the PD, Can't you use the one from the absorption-PD? I think they are both from TL and the power supply should be the same.
By the way, was there a reason to reject the PSDs which we used in the past?