FOCtek provide a wide range of birefringent crystals: YVO, Calcite, a-BBO, LiNbO3, quartz, etc. The crystals are widely used in the application of beam displacers, polarizing optics (Glan Laser, Glan Taylor, Glan Thompson, Wollaston and Rochon), optical isolators, circulators and interleaver, etc.
The comparation of refractive indices, birefringence, and walk off anlge for common crystals are listed below for reference. (Notes: ρ is walk off angle at crystal 45° cut)