Chen Sheng, Na Quanxin, Xu Changwen, Xu Tenggui, Li Quanming, Xuan Hongwen, Zhu Haiyong, Zhang Yan, Fan Dianyuan
Opt Lett. 2022 Feb 1;47(3):674-677. doi: 10.1364/OL.447826.
A Nd:YAG single-crystal fiber amplifier for the amplification of continuous-wave single-frequency laser end-pumped by a laser diode (LD) is investigated. With a two-stage amplification configuration, an output power of 60.4 W under the total incident pump power of 200 W is achieved, which is, to our knowledge, the highest power from a continuous-wave single-frequency laser achieved with a single-crystal fiber scheme. The extraction efficiency reaches 41.6% in the second amplification stage, which is comparable with Innoslab amplifiers. The beam quality factors M at the maximum output power in the horizontal and vertical direction are measured to be 1.51 and 1.38, respectively. The long-term power instability for 1 hour is 0.97%.
研究了一种用于放大由激光二极管（LD）端面泵浦的连续波单频激光的掺钕钇铝石榴石（Nd:YAG）单晶光纤放大器。采用两级放大结构，在总入射泵浦功率为200 W的情况下，实现了60.4 W的输出功率，据我们所知，这是采用单晶光纤方案获得的连续波单频激光的最高功率。在第二级放大中，提取效率达到41.6%，与Innoslab放大器相当。在最大输出功率下，水平和垂直方向的光束质量因子M分别测得为1.51和1.38。1小时的长期功率不稳定性为0.97%。
