Absolute non-linear optical coefficients measurements of CsLiB6O10 single crystals by second harmonic generation

Abstract We present absolute measurements of the effective non-linear optical coefficients d eff of cesium lithium borate crystals (CsLiB 6 O 10 , CLBO) by second harmonic generation using a continuous Nd-YAG laser source. The experiments were carried out at room temperature, on crystals cut perpendicular to type I or type II phase matching directions, with two different crystal lengths along the propagation direction. The d 36 and d 14 non-linear coefficients involved in d eff developments are deduced and are shown to be equal as it is predicted by the Kleinman symmetry. Two different compositions prepared by the Czochralski technique from melt with compositions of 1:1:6 and 1:1:5.5 molar ratios of Cs 2 O, Li 2 O and B 2 O 3 are comparatively studied.