摘要
三毫微秒的被动协调横梁联合由一个所有光的反馈环的做 Yb 的纤维放大器被 Dammann 栅栏 intracavity 认识到空间过滤器。由使用这 diffractive-optics-based 空间过滤技术，三根瓦孔激光横梁与 1.02 kW 的山峰力量是锁阶段的。联合脉搏的宽度是 9.6 ns，并且重复频率是 2.208 MHz。远地的干扰模式的可见性直到 82.9% 。结果证明这条途径能可伸缩到更大的数组和更高的力量。
A passive coherent beam combination of three nanosecond Yb-doped fiber amplifiers by an all-optical feedback loop is realized by a Dammann grating intracavity spatial filter. By using this diffractive-optics-based spatial filtering technique, three tile-aperture laser beams are phase-locked with a peak power of 1.02kW. The width of the combined pulses is 9.6 ns, and the repetition frequency is 2.208 MHz. The visibility of the far-field interference pattern is up to 82.9%. The results show that this approach can scale to larger arrays and higher powers.
基金
Supported by the National High Technology Research and Development Program of China under Grant No 2014AA041901, the NSAF Foundation of National Natural Science Foundation of China under Grant No U1330134, and the National Natural Science Foundation of China under Grant No 61308024.
