Zhang Xuguang, Ye Junzhi, Luo Xingwang, Chen Xiaoming, Zhang Lei, Xu Xiafei, Ren Huaijin, Lu Yanhua, Ma Yi, Gao Qingsong, Sun Jun, Wang Weimin
Appl Opt. 2021 Feb 1;60(4):971-975. doi: 10.1364/AO.414813.
In this paper, a two-stage partially pumped slab (Innoslab) microsecond amplifier at 1064 nm is reported. The 4.4-W single-frequency seed laser is amplified to 303.6 W, with an overall optical-optical efficiency of 25.7%. The overlapping efficiency of the first- and second- amplifier stage is 67% and 55.6%, respectively. The pulse width is 145.0 µs, at a repetition rate of 500 Hz, and the beam quality factor of is 1.84 and 1.71 in the horizontal and vertical directions, respectively. With higher overlap between the pump volume and the seed laser mode, the output power and optical-optical efficiency can be further improved.
本文报道了一种工作在1064nm的两级部分抽运平板（Innoslab）微秒放大器。4.4W的单频种子激光被放大至303.6W，总的光光效率为25.7%。第一级和第二级放大器的重叠效率分别为67%和55.6%。脉冲宽度为145.0µs，重复频率为500Hz，在水平和垂直方向上的光束质量因子分别为1.84和1.71。通过提高泵浦体积与种子激光模式之间的重叠度，输出功率和光光效率可以进一步提高。
