Matteo, Simon

attached, please find the maps and the distribution analysis of the polarization measurements on the Tama-sized Sapphire samples from Shinkosha.
The maps are taken with different polaization angles indicated in each figure, with 0 degrees being pure P-polarization.

Obviously, the birefringence effect is relatively homogeneous and divided into three parts with different offsets. The offsets itself may have their origin basically in the non-zero incident angle of the pump-beam.