Second-order nonlinear optical coefficients of the monoclinic crystal BaGa4Se7

Opt Lett. 2022 Feb 15;47(4):842-845. doi: 10.1364/OL.449826.

Abstract

We characterize the magnitude and relative signs of the second-order nonlinear optical coefficients of the biaxial crystal BaGa4Se7 (BGSe) combining measurements of phase-matched and non-phase-matched second-harmonic generation at different wavelengths using slabs and a sphere.