Jin Xiaoxi, Lee Elizabeth, Luo Jiaqi, Sun Biao, Ramalingam Vincent, Wang Qijie, Zhang Ying, Zhou Pu, Yu Xia
Opt Lett. 2018 Apr 1;43(7):1431-1434. doi: 10.1364/OL.43.001431.
We demonstrated a high-efficiency ultrafast Tm-doped fiber amplifier based on a resonant pumping technique. A continuous-wave fiber laser at 1940 nm was employed as the pump laser. The slope efficiency of the resonantly pumped pulsed Tm-doped fiber amplifier reached 87% with respect to the launched pump power. The maximum average output power reached 40 W when the launched pump power was 53 W. The repetition rate and the pulse duration of the output pulses from a fiber amplifier were 248 MHz and 129 ps, respectively. The corresponding peak power was 1.25 kW, and the pulse energy was 161.3 nJ. To the best of our knowledge, this is the first demonstration of a resonant pumping enabled high-power high-efficiency ultrafast fiber laser operating at a 2 μm band.
我们展示了一种基于共振泵浦技术的高效超快掺铥光纤放大器。采用波长为1940 nm的连续波光纤激光器作为泵浦激光器。共振泵浦脉冲掺铥光纤放大器的斜率效率相对于泵浦光注入功率达到了87%。当泵浦光注入功率为53 W时，最大平均输出功率达到40 W。光纤放大器输出脉冲的重复频率和脉冲宽度分别为248 MHz和129 ps。相应的峰值功率为1.25 kW，脉冲能量为161.3 nJ。据我们所知，这是首次展示在2μm波段运行的基于共振泵浦的高功率高效超快光纤激光器。
