Few-Mode Fiber Characterization System Based on the Spatially and Spectrally Imaging Technique

被引:3
作者
Yu, Jianxun [1 ]
Tan, Fengze [2 ]
Yu, Changyuan [1 ,2 ]
机构
[1] Hong Kong Polytech Univ, Elect & Informat Engn Dept, Photon Res Ctr, Hong Kong, Peoples R China
[2] Hong Kong Polytech Univ, Shenzhen Res Inst, Shenzhen 518057, Peoples R China
关键词
few-mode fiber; mode dispersion; mode coupling; HIGHER-ORDER MODES; DECOMPOSITION; TRANSMISSION;
D O I
10.3390/s22051809
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
With the widespread use of few-mode fibers, mode characteristics testing becomes essential. In this paper, current few-mode fiber testing techniques are discussed, and the S-2 imaging technique is chosen and demonstrated to be capable of few-mode fiber characterization in principle. As a result, the few-mode fiber characterization system with the S-2 imaging technique is built and used to obtain accurate mode dispersion of two-mode fibers (a commonly used few-mode fiber) of different lengths. Then, various filters are applied to extract the fundamental and high-order modes to acquire mode coupling components (discrete and distributed mode coupling). The proposed system spectrally characterizes the few-mode fiber by resolving the interference information from the superimposed optical field spatially and has a simple structure and easy operation, which will provide parameter guidance for FMF designing and the FMF sensing experiment optimizing.
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页数:13
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