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Proceedings Paper

Refractive index and curvature sensitivity of LPFG inscribed in few-modes fiber
Author(s): Qiuli Wang; Mei Sang; Chenhao Zhong; Jie Dong
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Paper Abstract

A novel long period fiber grating (LPFG) is inscribed in few-mode fibers(FMFs) by CO2 laser-irradiation method. The experiment results and theoretical calculation demonstrate that the LPFGs are originated from the strong coupling between the high-order core mode LP02 and the LP04 cladding mode. The resonant wavelengths of the LPFGs is found to shift toward the lower wavelength with refractive index(RI) of surrounding or curvature increasing. For comparision, LPFGs that coupling fundamental core mode to the same cladding mode are inscribed in single-mode fibers(SMFs) by the same method. The LPFGs inscribed in FMFs have higher RI sensitivity and slight lower curvature sensitivity comparing with LPFGs inscribed in SMFs.

Paper Details

Date Published: 24 October 2017
PDF: 6 pages
Proc. SPIE 10464, AOPC 2017: Fiber Optic Sensing and Optical Communications, 1046408 (24 October 2017); doi: 10.1117/12.2283308
Show Author Affiliations
Qiuli Wang, Tianjin Univ. (China)
Mei Sang, Tianjin Univ. (China)
Chenhao Zhong, Tianjin Univ. (China)
Jie Dong, Tianjin Univ. (China)

Published in SPIE Proceedings Vol. 10464:
AOPC 2017: Fiber Optic Sensing and Optical Communications
Zi-Sen Zhao; Leping Wei; Yanbiao Liao; Weixu Zhang; Desheng Jiang; Wei Wang; Kenneth T. V. Grattan, Editor(s)

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