| 基于偏振自适应和主动相位控制的相干合成的实验研究 |
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| 引用本文： | 熊玉朋,粟荣涛,李霄,马阎星,许晓军.基于偏振自适应和主动相位控制的相干合成的实验研究[J].强激光与粒子束,2013,25(1):5-6. |
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| 作者姓名： | 熊玉朋 粟荣涛 李霄 马阎星 许晓军 |
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| 作者单位： | 1.国防科学技术大学 光电科学与工程学院, 长沙 41 0073 |
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| 摘 要： | 进行了非保偏放大器与保偏放大器的相干合成的实验研究。通过随机并行梯度下降（SPGD）算法对非保偏放大器进行偏振自适应控制，使非保偏放大器输出激光的消光比达到11.5 dB，与保偏放大器在同一偏振方向上的光功率占总功率的93.4%。利用单抖动法进行非保偏放大器与保偏放大器的主动相位控制，实现相干合成。实验结果表明:SPGD算法能够有效实现偏振自适应控制，偏振自适应控制前后相干合成远场的条纹对比度从80.1%提高到87.2%，相干合成的效果提升明显；通过增加参与合成的放大器路数，并在各路激光中引入多级功率放大器，能够得到更高的合成功率输出。
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| 关 键 词： | 光纤放大器 相干合成 偏振自适应控制 随机并行梯度下降算法 |
| 收稿时间： | 2012/4/8 |
Coherent beam combining based on adaptive polarization and active phase control technique |
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| Xiong Yupeng,Su Rongtao,Li Xiao,Ma Yanxing,Xu Xiaojun.Coherent beam combining based on adaptive polarization and active phase control technique[J].High Power Laser and Particle Beams,2013,25(1):5-6. |
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| Authors: | Xiong Yupeng Su Rongtao Li Xiao Ma Yanxing Xu Xiaojun |
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| Affiliation: | 1.College of Opto-electric Science and Engineering,National University of Defense Technology,Changsha 410073,China |
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| Abstract: | An experiment of coherent beam combination of a polarization maintaining(PM) ytterbium doped fiber amplifier (YDFA) and a non-PM YDFA is carried out. The adaptive polarization control based on the stochastic parallel gradient descent (SPGD) algorithm is obtained in the non-PM YDFA to make the output light polarization stable. The single frequency dithering algorithm is taken to compensate the phase errors in the system. The contrast of the far-field pattern increases remarkably from 80.1% to 87.2%. A scalable architecture for coherent beam combining of two styles of fiber amplifiers is also proposed. |
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| Keywords: | fiber amplifier coherent beam combination adaptive polarization control stochastic parallel gradient descent algorithm |
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