Determination of the nonlinear optical coefficients of the Li_xCs_(1−x)B_3O_5 crystals

The nonlinear optical coefficients of LiB3O5 (LBO), CsB3O5 (CBO), and CsLiB6O10 (CLBO) crystals have been measured by both the Maker fringe technique and the phase-matching method. With the former technique the coefficients of LBO, CBO, and CLBO crystals have been determined relative to d36 (KDP) at the wavelength 1064.2 nm. The relative ratios of the dij coefficients measured by Maker fringe technique have been found to be in good agreement with those deduced by the phase-matching method.