[Marc, Shalika]

We were guessing that part of the peak-to-peak uncertainty is due to the unwrapping of the ellipticity.

We decided to switch to cross-polarizer characterization as there is only 1 unwrapping compared to 2 in the direct characterization.

We tuned HWP and QWP to generate an input polarization state with ellipticity = 0.1deg and azimth = 0.05deg.

We installed a power meter to monitor a pick-off of the input beam. We measured input power of 3.6 mW and after HWP/QWP 0.8 mW.

This powermeter readout is also implemented inside our VI.

We installed a TAMA polarizer before the camera (NEWPORT 10GL08AR.33) before the camera and rotated it to minimize the transmitted power (36 nW)

We installed our LC and rotated it to maximize the transmitted power (23 uW).

We took some measurements in this configuration but it does not seem to improve our fitting uncertainty.

Maybe we should try to tweak our fitting function as it seems that most of the fitting error arises around our inflection point.