A compact all-solid-state DUV-laser source producing a short pulse at 228.5 nm is reported. The acoustically Q-switched quasi-three-level Nd∶YVO4 laser at 914 nm is first intra-cavity frequency doubled into a blue laser with an LBO nonlinear crystal, and then into a DUV output from externally frequency doubling of the blue laser with a BBO nonlinear crystal. The 228.5 nm DUV pulsed laser output power of 10 mW is obtained, with a stable output power and good output beam quality. The present laser system is simple, compact and portable compared with the Ti: sapphire UV Raman laser reported earlier. Our laser source can be favorably used in the spectroscopic measurement of explosives and biomolecules.
Zhibin Zhao, Hao Chen, Dongxin Xu, Cheng Cheng, Quan Li, Guojun Liu, Zhongliang Qiao, Li Sun, Quan Zheng, Yi Qu, Baoxue Bo. LD End-Pumped All-Solid-State Acousto-Optical Q-Switched 228.5 nm Deep Ultraviolet Laser[J]. Chinese Journal of Lasers, 2022, 49(3): 0315001
