Guo Chuan, Zuo Junwei, Bian Qi, Xu Chang, Zong Qinshuang, Bo Yong, Shen Yu, Zong Nan, Gao Hongwei, Lin Yanyong, Yuan Lei, Liu Yang, Cui Dafu, Peng Qinjun, Xu Zuyan
Appl Opt. 2017 Apr 20;56(12):3445-3448. doi: 10.1364/AO.56.003445.
We demonstrate a compact, high-power, quasi-continuous-wave (QCW) end-pumped 1319 nm Nd:YAG slab amplifier laser with good beam quality. The laser is based on a QCW pulse Nd:YAG master oscillator and Nd:YAG slab amplifier with multi-pass zigzag architecture. The amplifier operates at a pulse repetition frequency of 500 Hz and pulse width of ∼105 μs, delivering a maximum output power of 51.5 W under absorbed pump power of 217.8 W and corresponding to an extraction efficiency of 14.2%. The beam quality factor is measured to be Mx2=1.61 and My2=1.81 in the orthogonal directions. To the best of our knowledge, this is the first compact, high-power, high-beam-quality QCW Nd:YAG amplifier at 1319 nm based on a multi-pass zigzag slab structure.
