Coherent Beam Combination of Eight Watt-Level Polarization-Maintained Fiber Amplifiers

We demonstrate the coherent beam combination of eight Watt-level polarization-maintained fiber amplifiers. The phase control signal of each amplifier is generated by running a stochastic parallel gradient descent algorithm on a digital signal processor （DSP）. The experimental result shows that the w...

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Bibliographic Details
Published inChinese physics letters Vol. 27; no. 3; pp. 159 - 161
Main Author 周朴 王小林 马阎星 马浩统 许晓军 刘泽金
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.03.2010
Subjects
Amplifiers
Beams (radiation)
Coherence
Digital
Fibers
Microprocessors
Running
Signal processing
信号产生
光纤放大器
数字信号处理器
梯度下降算法
相干光束
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Summary:We demonstrate the coherent beam combination of eight Watt-level polarization-maintained fiber amplifiers. The phase control signal of each amplifier is generated by running a stochastic parallel gradient descent algorithm on a digital signal processor （DSP）. The experimental result shows that the whole system in close-loop performs well for long-time observation. Energy encircled in the target pinhole is 6.68 times more than that in open-loop. The combination efficiency is as high as 84.5%.
Bibliography:TN929.11
O436.1
11-1959/O4
ObjectType-Article-2
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ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/27/3/034203