Fast and Simultaneous Measurement of Both Birefringence and Azimuth Angle Using a $y$-Cut LiNbO3 Phase Modulator

For fast and simultaneous measurement of both birefringence and azimuth angle of samples, a technique using transverse phase modulator is proposed. The phase modulator includes y-cut z-propagation LiNbO3 crystal. Several experiments using rotating quarter-wave plates and LiNbO3 crystal in presence of direct voltage have been performed, and the measurement results agree well with predicted theoretical data.