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

页码：853 / 856

页数：4

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