Frequency-domain interferometry has been used to find the optical axis of a uniaxial, birefringent crystal. The dependence of the interference fringe spacing on the incident angle and the direction of the optical axis were determined in a 4.6-cm-thick KDP crystal.
© 1997 Optical Society of America
L. Zheng, O. A. Konoplev, and D. D. Meyerhofer, "Determination of the optical-axis orientation of a uniaxial crystal by frequency-domain interferometry," Opt. Lett. 22, 931-933 (1997)