Marc, Michael, Yuhang

We checked the p polarization power after sample at its center while injecting s polarization and rotating the sample.

Result is attached to this entry.

Note that here, the positive rotation is opposite of positive rotation of the HWP. It means that we expect to see the minimum of p polarization power around -41.5 deg.

We indeed find a minimum around this position and started new measurement with the mirror rotated by -46.5 degrees.

During this measurement we found out that we have 2 beams on each port of the PBS on the readout part (maybe due to birefringence induced beam splitting).