Study of the Coupling Efficiency of Spatial Light into Single-mode Multi-core Fiber

doi:10.3969/j.issn.1000-1093.2017.12.015

Abstract

Abstract: In space laser communication, the coupling efficiency of spatial light into single-mode fiber is a key parameter of studying the performance of the system receiver. In order to reduce the difficulty of spatial light coupling into single-mode fiber, a single-mode multi-core fiber is used to receive signal light, a coupling efficiency model is established by taking seven-core fiber for example, and the effect of numerical aperture on the coupling efficiency of seven-core fibers with different fiber core arrangements is analyzed. The coupling efficiency of seven-core fiber increases first and then decreases with the increase in numerical aperture; the coupling efficiency of fiber which fiber cores are arranged in regular hexagon is higher than that which fiber cores are arranged in line. The coupling efficiencies in the presence of tilt, defocus and random angular jitter are studied. In the presence of lateral offset, the coupling efficiency of seven-core fiber has a periodic change. When the lateral offsets are 10 μm, 15 μm and 17 μm, the coupling efficiencies of seven-core fiber are about 14.4%, 39.6% and 36.9% higher than those of single-core fiber with the same core area, respectively. When the axial offset is 0.1 mm, the coupling efficiency of seven-core fiber is about 12.9% higher than that of single-core fiber with the same core area. When the standard deviation of random jitter amplitude is 6μm, the coupling efficiency of seven-core fiber is about 7% higher than that of single-core fiber with the same core area. Accordingly, the multi-core fiber inhibits tilt, defocus and random angular jitter. Key

Key words: communicationtechnology, free-spaceopticalcommunication, single-modesingle-corefiber, single-modemulti-corefiber, couplingefficiency

CLC Number:

TN914.1

FAN Xue-bing, WANG Chao, TONG Shou-feng, NAN Hang, GUAN Shu, HAO Shi-cong, JIANG Hui-lin. Study of the Coupling Efficiency of Spatial Light into Single-mode Multi-core Fiber[J]. Acta Armamentarii, 2017, 38(12): 2414-2422.

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第38卷第12期
2017 年12月兵工学报ACTA
ARMAMENTARIIVol.38No.12Dec.2017

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