In this letter, a 116-actuator deformable mirror (DM) was used to correct the wavefront distortion in a 10.7 J, 10 Hz Nd:YAG slab amplifier. By applying a pump-light homogenizer to transform the 3×1 near-field beam array into an integrated beam, the beam quality was greatly improved from 5.54 times diffraction limited (TDL) to 1.57 TDL after being corrected by the DM. To the best of our knowledge, this is the first investigation on the beam quality control of an arrayed near-field beam in the high-energy diode-pumped solid-state lasers.
Sun Licheng, Liu Tinghao, Fu Xing, Guo Yading, Wang Xiaojun, Shao Chongfeng, Zheng Yamin, Sun Chuang, Lin Shibing, Huang Lei. 1.57 times diffraction limited high-energy laser based on a Nd:YAG slab amplifier and an adaptive optics system[J]. Chinese Optics Letters, 2019, 17(5): .
