The BGSe crystal is a new type of wide-bandgap IR NLO material with unique advantages and good application prospects in mid-far IR laser output via the frequency down-conversion process. The future research direction of BGSe mainly focuses on improving the crystal quality, searching for the optimal phase-matching direction, and solving the matching problem between the different types of pump sources and the optical properties of BGSe.
Xianghe Meng, Zhuang Li, Jiyong Yao. Property and Application of New Infrared Nonlinear Optical Crystal BaGa4Se7[J]. Chinese Journal of Lasers, 2022, 49(1): 0101005