All-Solid-State DUV Light Source by Quadrupling of an Acousto-Optically Q-Switched Nd: YVO4 Laser. - Zhibin Zhao; Hao Chen; Guojun Liu; Cheng Cheng; Quan Li; Zhongliang Qiao; Yi Qu; Qiongtao Xie; Jiang Zhu; Quan Zheng 002; Baoxue Bo (IEEE Access, 2021)