中国激光, 2012, 39 (1): 0102004, 网络出版: 2011-12-01
两路纳秒脉冲光纤激光相干合成的实验研究
Coherent Beam Combining of Two Nanosecond Fiber Pulse Lasers
激光器 光纤激光器 脉冲激光 相干合成 随机并行梯度下降算法 lasers fiber laser pulse laser coherent beam combining stochastic parallel gradient descent algorithm
摘要
报道了两路纳秒脉冲光纤激光的相干合成(CBC)实验。利用主振荡功率放大(MOPA)结构搭建两路全保偏光纤激光放大器,利用随机并行梯度下降(SPGD)算法对两路放大器进行相干合成,获得了重复频率10 MHz、脉冲宽度10 ns、平均功率50 mW的脉冲激光输出。系统闭环时目标圆孔内能量提高了1.76倍,远场光斑条纹对比度提高了4.38倍。
Abstract
An experiment of coherent beam combining (CBC) of pulse laser in master oscillator power amplifier (MOPA) configuration using stochastic parallel gradient descent (SPGD) algorithm is reported. An output power of 50 mW is obtained by CBC of two pulse lasers with repetition rate of 10 MHz and pulse duration of 10 ns. When the system evolves from open-loop to closed-loop, the energy encircled in the target is enhanced by a factor of 1.76, and the fringe visibility of the long exposure pattern is increased by a factor of 4.38.
粟荣涛, 周朴, 马阎星, 王小林, 许晓军. 两路纳秒脉冲光纤激光相干合成的实验研究[J]. 中国激光, 2012, 39(1): 0102004. Su Rongtao, Zhou Pu, Ma Yanxing, Wang Xiaolin, Xu Xiaojun. Coherent Beam Combining of Two Nanosecond Fiber Pulse Lasers[J]. Chinese Journal of Lasers, 2012, 39(1): 0102004.