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Experimental demonstration of single-mode fiber coupling using adaptive fiber coupler
Luo, Wen1,2,3; Geng, Chao1,2; Wu, Yun-Yun1,2,3; Tan, Yi1,2,3; Luo, Qi1,2,3; Liu, Hong-Mei1,2,3; Li, Xin-Yang1,2; Li, X.-Y. (xyli@ioe.ac.cn)
Source PublicationChinese Physics B
Volume23Issue:1Pages:014207
2014
Language英语
ISSN16741056
DOI10.1088/1674-1056/23/1/014207
Indexed BySCI ; Ei
WOS IDWOS:000331805400040
Subtype期刊论文
AbstractCoupling 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.; 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.
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Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ioe.ac.cn/handle/181551/6377
Collection自适应光学技术研究室(八室)
Corresponding AuthorLi, X.-Y. (xyli@ioe.ac.cn)
Affiliation1. Key Laboratory on Adaptive Optics, Chinese Academy of Sciences, Chengdu 610209, China
2. Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China
3. University of Chinese Academy of Sciences, Beijing 100049, China
Recommended Citation
GB/T 7714
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.
APA Luo, Wen.,Geng, Chao.,Wu, Yun-Yun.,Tan, Yi.,Luo, Qi.,...&Li, X.-Y. .(2014).Experimental demonstration of single-mode fiber coupling using adaptive fiber coupler.Chinese Physics B,23(1),014207.
MLA Luo, Wen,et al."Experimental demonstration of single-mode fiber coupling using adaptive fiber coupler".Chinese Physics B 23.1(2014):014207.
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