Zhou Pu, Ma Yanxing, Wang Xiaolin, Ma Haotong, Wang Jianhua, Xu Xiaojun, Liu Zejin
College of Optoelectric Science and Engineering, National University of Defense Technology, Changsha 410073, China.
Appl Opt. 2009 Nov 20;48(33):6537-40. doi: 10.1364/AO.48.006537.
We demonstrate the coherent beam combination of a hexagonal distributed high power fiber amplifier array. Six polarization-maintained fiber amplifiers are tiled into a hexagonal array by use of a novel beam combiner. The phase control signal for fiber amplifiers is generated by running a stochastic parallel gradient descent algorithm on a digital signal processor. The coherent beam combination with a total output power of 73.5 W is demonstrated. The contrast of the coherent combined beam profile is as high as 81% when the system is closed-loop controlled.
我们展示了六边形分布的高功率光纤放大器阵列的相干光束合成。利用一种新型光束合成器将六个保偏光纤放大器排列成六边形阵列。通过在数字信号处理器上运行随机并行梯度下降算法来生成光纤放大器的相位控制信号。演示了总输出功率为73.5W的相干光束合成。当系统进行闭环控制时，相干合成光束轮廓的对比度高达81%。
