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Journal of Applied Sciences >

2020 , Vol. 38 >Issue 2: 310 - 338

DOI: https://doi.org/10.3969/j.issn.0255-8297.2020.02.007

Optical Fiber Sensors Technology

Few-Mode Fiber Long-Period Gratings—From Mode Conversion to High Sensitivity Fiber-Optic Sensing

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  • 1. Institute of Logistics Science and Engineering, Shanghai Maritime University, Shanghai 201306, China;
    2. Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200444, China

Received date: 2020-01-18

  Online published: 2020-04-01

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Abstract

Few-mode fber (FMF) long-period grating (LPG) with advantages of good wavelength selectivity, low insertion loss, flexible structure, high integration and compatibility with optical fber systems,is an effective means to realize mode conversion and vortex mode regulation in the FMF, which have great potential for applications in the optical fber communications and fber-optic sensing. This paper presents the research progress of FMF-LPG in mode conversion and optical fber sensing. Firstly, the mode coupling principle and fabrication methods of FMF-LPG are introduced. Then, the mode converters based on FMF-LPG including standard LPG and helical LPG are investigated. Finally, the working principle and implementation method of fber-optic sensors based on FMF-LPG are demonstrated.

Key words： few-mode fber; long-period grating; mode converter; fber-optic sensing

Cite this article

ZHAO Yunhe, LIU Yunqi . Few-Mode Fiber Long-Period Gratings—From Mode Conversion to High Sensitivity Fiber-Optic Sensing[J]. Journal of Applied Sciences, 2020 , 38(2) : 310 -338 . DOI: 10.3969/j.issn.0255-8297.2020.02.007

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