A 117-W 1.66-Times Diffraction Limited Continuous-Wave Nd:YVO$_{4}$ Zigzag Slab Laser with Multilayer Amplified-Spontaneous-Emission Absorbing Coatings
Zhi-Feng Zhang1,2, Shuai Li3, Yang Li2, Yang Kou2, Ke Liu2, Yan-Yong Lin2, Lei Yuan2, Yi-Ting Xu2**, Qin-Jun Peng2, Zu-Yan Xu2
1University of Chinese Academy of Sciences, Beijing 100190, China 2Key Laboratory of Solid-State Laser, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China 3Beijing Aerocim Technology Co., Ltd, Beijing 100043, China
Abstract：We report a continuous-wave end-pumped Nd:YVO$_{4}$ zigzag slab laser with multilayer amplified spontaneous emission (ASE) absorbing coatings. The coatings are deposited on the slab faces. A five-layer structure consists of SiO$_{2}$-Ti-SiO$_{2}$-Ti-Au, and the thicknesses are 2520 nm, 10 nm, 160 nm, 24 nm and 200 nm, respectively. The designed coatings show good performance for the ASE control in the experimental tests. A stable-unstable hybrid laser oscillator along orthogonal directions in the slab aperture is further configured, achieving the 117 W output at a pump of 328 W. The beam quality factors $M^{2}$ in the unstable direction and stable direction are 1.57 and 1.66, respectively.
2020, Vol. 37 
