Theoretical Analysis for the Fast Birefringence Measurement System using Dual Electro-optic Crystal Modulators

Abstract

Two y-cut z-propagation (Y-Z) LiNbO₃ (LN) electro-optic (EO) crystals have been considered as transverse phase modulators for the fast birefringence measurement. To obtain birefringent parameters from modulated polarization status, the LN crystals were driven at different frequencies. This work aims to analyze the effect of parameters such as modulation amplitude and the order of Bessel functions on decision of the frequency ratio of drivers. According to our theoretical analysis, it was found that the modulation amplitude greatly influences the selection of the driving frequency.