Previous entries reported strange anti-correlation of s and p polarization power while not changing polarization.

Furthermore we had also s polarization power too constant while rotating the mirror.

Today I found out that the PSD were saturating despite neither the PSD displays nor the lockin-amplifier showing saturation.

This is because I forgot to reduce the laser power after checking the beam parameter with the razor blades.

The power is now decreased from 14 mW to 1.6 mW.

I redid the calibration measurement and started measurement with rotated sample and s polarization.