Coherent beam combining of two fiber amplifiers using stochastic parallel gradient descent algorithm

被引：25
|
作者：
Zhou, Pu [1 ]
Liu, Zejin [1 ]
Wang, Xiaolin [1 ]
Ma, Yanxing [1 ]
Ma, Haotong [1 ]
Xu, Xiaojun [1 ]
机构：
[1] Natl Univ Def Technol, Coll Optielect Sci & Engn, Changsha 410073, Hunan, Peoples R China
来源：
OPTICS AND LASER TECHNOLOGY | 2009年 / 41卷 / 07期
关键词：
Coherent beam combining; Fiber amplifier; Stochastic parallel gradient descent; HIGH-POWER; COMBINATION;
D O I：
10.1016/j.optlastec.2009.03.002
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We demonstrate the coherent beam combining of fiber amplifiers using a stochastic parallel gradient descent (SPGD) algorithm, producing a total output power of 23W. Active phase control on each amplifier is performed by running the SPGD algorithm on a DSP chip with updating rate of almost 100 kHz. Experimental results show that power encircled in the target pinhole in closed-loop mode is 1.85 times more than that in open-loop mode, which is 92% of the ideal case. The fringe contrast of the far-field fringe pattern is as high as 92% when the system is in closed-loop mode. The whole system in closed-loop mode performs well in a long-time observation. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：853 / 856
页数：4
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