College of Opticelectric Science and Engineering, National University of Defense Technology, Changsha, China.
Opt Lett. 2012 Feb 15;37(4):497-9. doi: 10.1364/OL.37.000497.
We report on active coherent beam combining of two single-frequency nanosecond fiber amplifiers by using stochastic parallel gradient descent algorithm. Each fiber amplifier produces an average power of more than 100 W by using three-stage cascaded amplification. The two laser beams are actively phase-locked with a total average power of 215.8 W, producing ~8 ns pulses at 10 MHz repetition rate. The contrast of the far-field intensity pattern of the coherently combined beam is more than 83%.
我们报告了通过使用随机并行梯度下降算法对两个单频纳秒光纤放大器进行主动相干光束合成。每个光纤放大器通过三级级联放大产生超过 100 W 的平均功率。两束激光通过主动相位锁定，总平均功率为 215.8 W，产生 10 MHz 重复率的 ~8 ns 脉冲。相干合成光束的远场强度模式对比度超过 83%。
