Application of imaging conoscope for optical inhomogeneity testing in LiNbO_(3) crystals and components

摘要

A computer-controlled imaging conoscope has been used for investigation of optical homogeneity in undoped LiNbO_(3) crystals pulled by the Czochralski method, and also for testing of optical elements, like e.g. electrooptic modulators. The two maps acquired for two perpendicular directions in the crystal (Z-optical axis, and usually Y-axis) are utilized simultaneously for eliminating optically inhomogeneous areas from their use in optics and electrooptics, as well as in a wider research program including optimization of the growth technique and investigation of influence of crystal perfection on device performance.