College of Optic-electric Science and Engineering, National University of Defense Technology, Changsha 410073, China.
Opt Lett. 2012 Oct 1;37(19):3978-80. doi: 10.1364/OL.37.003978.
Coherent beam combining of an 800 W nanosecond single-frequency fiber amplifier array has been demonstrated. Five high-power all-fiberized Yb-fiber amplifiers were tiled into a crisscross array, and the laser beams were actively phase-locked by using the stochastic parallel gradient descent algorithm. The contrast of the far-field intensity pattern of the combined beam was more than 91.6%. The combined pulsed laser has a pulse width of ~3.5 ns and a peak power of 21.5 kW.
已经实现了 800 W 纳秒单频光纤放大器阵列的相干光束组合。将五个高功率全光纤化 Yb 光纤放大器平铺成十字交叉阵列，并使用随机并行梯度下降算法对激光束进行主动相位锁定。组合光束的远场强度模式对比度超过 91.6%。组合后的脉冲激光的脉宽约为 3.5 ns，峰值功率为 21.5 kW。
