题名: Experimental demonstration of single-mode fiber coupling using adaptive fiber coupler
作者: Luo, Wen 1,2,3 ; Geng, Chao 1,2 ; Wu, Yun-Yun 1,2,3 ; Tan, Yi 1,2,3 ; Luo, Qi 1,2,3 ; Liu, Hong-Mei 1,2,3 ; Li, Xin-Yang 1,2
刊名: Chinese Physics B
出版日期: 2014
卷号: 23, 期号: 1, 页码: 014207 学科分类: Adaptive optics - Bandwidth - Efficiency - Experiments - Gradient methods - Jitter - Mean square error - Single mode fibers
DOI: 10.1088/1674-1056/23/1/014207
通讯作者: Li, X.-Y. (xyli@ioe.ac.cn)
文章类型: 期刊论文
中文摘要: Coupling plane wave into a single-mode fiber (SMF) with high and steady coupling efficiency is crucial for fiber-based free-space laser systems, where random angular jitters are the main influencing factors of fiber coupling. In this paper, we verified a new adaptive-optic device named adaptive fiber coupler (AFC) which could compensate angular jitters and improve the SMF coupling efficiency in some degree. Experiments of SMF coupling under the angular jitter situation using AFC have been achieved. Stochastic parallel gradient descent (SPGD) algorithm is employed as the control strategy, of which the iteration rate is 625 Hz. In closed loop, the coupling efficiency keeps above 65% when angular errors are below 80 μrad. The compensation bandwidth is 35 Hz at sine-jitter of 15 μrad amplitude with average coupling efficiency of above 60%. Also, experiments with simulated turbulence have been studied. The average coupling efficiency increases from 31.97% in open loop to 61.33% in closed loop, and mean square error (MSE) of coupling efficiency drops from 7.43% to 1.75%. © 2014 Chinese Physical Society and IOP Publishing Ltd. 英文摘要: Coupling plane wave into a single-mode fiber (SMF) with high and steady coupling efficiency is crucial for fiber-based free-space laser systems, where random angular jitters are the main influencing factors of fiber coupling. In this paper, we verified a new adaptive-optic device named adaptive fiber coupler (AFC) which could compensate angular jitters and improve the SMF coupling efficiency in some degree. Experiments of SMF coupling under the angular jitter situation using AFC have been achieved. Stochastic parallel gradient descent (SPGD) algorithm is employed as the control strategy, of which the iteration rate is 625 Hz. In closed loop, the coupling efficiency keeps above 65% when angular errors are below 80 μrad. The compensation bandwidth is 35 Hz at sine-jitter of 15 μrad amplitude with average coupling efficiency of above 60%. Also, experiments with simulated turbulence have been studied. The average coupling efficiency increases from 31.97% in open loop to 61.33% in closed loop, and mean square error (MSE) of coupling efficiency drops from 7.43% to 1.75%. © 2014 Chinese Physical Society and IOP Publishing Ltd. 收录类别: SCI
; Ei
项目资助者: National Natural Science Foundation of China [61205069]
语种: 英语
WOS记录号: WOS:000331805400040
ISSN号: 16741056
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内容类型: 期刊论文
URI标识: http://ir.ioe.ac.cn/handle/181551/6377
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. Key Laboratory on Adaptive Optics, Chinese Academy of Sciences, Chengdu 610209, China
Recommended Citation:
Luo, Wen,Geng, Chao,Wu, Yun-Yun,et al. Experimental demonstration of single-mode fiber coupling using adaptive fiber coupler[J]. Chinese Physics B,2014,23(1):014207.
