Zhang Hanwei, Wang Xiaolin, Zhou Pu, Gong Zhiqun, Xu Xiaojun
College of Optoelectric Science and Engineering, National University of Defense Technology, Changsha, China.
Appl Opt. 2012 Oct 10;51(29):6933-6. doi: 10.1364/AO.51.006933.
We report an all-fiberized, high-pulse-energy, high-average-power, Q-switched fiber master oscillator power amplifier (MOPA) oscillated at 1064 nm. The seed source is an acousto-optic Q-switched fiber laser, which is driven by an arbitrary waveform generator. A preamplifier is developed to boost the average power to about 3 W. Finally, we achieved an average output power of more than 62 W and a pulse energy of 6.2 mJ at 10 kHz repetition rate. The pulse duration is about 157 ns corresponding to the peak power of 37.1 kW. The optical-to-optical efficiency of the main amplifier is 61.3%. The beam quality factors (M2) are 3.1 in both directions.
我们报道了一种全光纤化、高脉冲能量、高平均功率、调Q光纤主振荡功率放大器（MOPA），其振荡波长为1064 nm。种子源是一个声光调Q光纤激光器，由任意波形发生器驱动。研制了一个前置放大器，将平均功率提升至约3 W。最终，我们在10 kHz重复频率下实现了超过62 W的平均输出功率和6.2 mJ的脉冲能量。脉冲持续时间约为157 ns，对应峰值功率为37.1 kW。主放大器的光光效率为61.3%。两个方向上的光束质量因子（M2）均为3.1。
