Selective transverse mode operation of a fiber laser based on few-mode FBG for rotation sensing | Zendy

Xiao Liang | Zendy; Li Yang | Zendy; Zhaoxin Geng | Zendy; Zhingming Liu | Zendy

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Selective transverse mode operation of a fiber laser based on few-mode FBG for rotation sensing

Author(s) -

Xiao Liang,

Li Yang,

Zhaoxin Geng,

Zhingming Liu

Publication year - 2019

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.27.037964

Subject(s) - optics , materials science , rotation (mathematics) , single mode optical fiber , core (optical fiber) , transverse mode , mode coupling , coupling (piping) , equilibrium mode distribution , laser , mode field diameter , mode (computer interface) , resonance (particle physics) , radiation mode , optical fiber , fiber optic sensor , graded index fiber , physics , geometry , mathematics , particle physics , metallurgy , computer science , operating system

A fiber laser with selective transverse mode operation based on few-mode FBG was designed, and rotation sensing via hybrid mode operation was successfully demonstrated. The mode selection was achieved by a few-mode FBG inscribed in homemade elliptical multilayer-core fiber (EMCF). The particular designed EMCF only supports LP 01 and LP 11 even mode groups, and the resonance of a few-mode FBG could be adjusted through mode excitation. Therefore, selective transverse mode operation was realized by switching the resonance wavelengths corresponding to the self-coupling mode or cross-coupling mode. Besides, rotation sensing was achieved in the hybrid mode operation due to the asymmetric multilayer-core design. A sensitivity of 0.074 mW/° was preliminarily demonstrated. The measured angle of the rotation sensing system is within ± 2° in the temperature range of 10-90 °C, showing that this system was inherently insensitive to temperature, eliminating the requirement for temperature compensation.

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