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题名:
350-W coherent beam combining of fiber amplifiers with tilt-tip and phase-locking control
作者: Wang, Xiong1; Wang, Xiaolin1; Zhou, Pu1; Su, Rongtao1; Geng, Chao2; Li, Xinyang2; Xu, Xiaojun1; Shu, Bohong1
刊名: IEEE Photonics Technology Letters
出版日期: 2012
卷号: 24, 期号:19, 页码:1781-1784
学科分类: Amplifiers (electronic) - Fiber lasers - Fibers - Gradient methods - Phase modulation
DOI: 10.1109/LPT.2012.2214769
通讯作者: Wang, X. (wangxiong23@gmail.com)
文章类型: 期刊论文
中文摘要: We demonstrate the coherent beam combining (CBC) of a 350-W single-frequency fiber amplifier array with simultaneous tilt-tip control and phase-locking control. An adaptive fiber-optics collimator is employed to perform the tilt-tip control, and the phase-locking control is realized by the phase modulator. The fiber array in the CBC system consisted of two high-power fiber amplifiers, each with output power of about 175 W. Stochastic parallel gradient descent algorithm is employed in both tilt-tip and phase-locking control. The tilt-tip control makes two separate laser beams overlap with each other in the far field, while the phase-locking control compensates the piston phase differences between the fiber lasers. Normalized power in bucket increases from 0.27 in open loop to 0.99 in closed loop. The fringe contrast is improved from 0% to more than 97% correspondingly. The tilt-tip control bandwidth is higher than 5.4 Hz when the tilt-tip mean square error is 10 μ rad. © 1989-2012 IEEE.
英文摘要: We demonstrate the coherent beam combining (CBC) of a 350-W single-frequency fiber amplifier array with simultaneous tilt-tip control and phase-locking control. An adaptive fiber-optics collimator is employed to perform the tilt-tip control, and the phase-locking control is realized by the phase modulator. The fiber array in the CBC system consisted of two high-power fiber amplifiers, each with output power of about 175 W. Stochastic parallel gradient descent algorithm is employed in both tilt-tip and phase-locking control. The tilt-tip control makes two separate laser beams overlap with each other in the far field, while the phase-locking control compensates the piston phase differences between the fiber lasers. Normalized power in bucket increases from 0.27 in open loop to 0.99 in closed loop. The fringe contrast is improved from 0% to more than 97% correspondingly. The tilt-tip control bandwidth is higher than 5.4 Hz when the tilt-tip mean square error is 10 μ rad. © 1989-2012 IEEE.
收录类别: SCI ; Ei
语种: 英语
WOS记录号: WOS:000308961000008
ISSN号: 10411135
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ioe.ac.cn/handle/181551/6319
Appears in Collections:自适应光学技术研究室(八室)_期刊论文

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作者单位: 1. College of Optoelectric Science and Engineering, National University of Defense Technology, Changsha, 410073, China
2. Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, 610209, China

Recommended Citation:
Wang, Xiong,Wang, Xiaolin,Zhou, Pu,et al. 350-W coherent beam combining of fiber amplifiers with tilt-tip and phase-locking control[J]. IEEE Photonics Technology Letters,2012,24(19):1781-1784.
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