Refractive index and curvature sensitivity of LPFG inscribed in fewmodes fiber

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Affiliation of Author(s):Tianjin University

Journal:Proceedings of SPIE

Place of Publication:美国

Key Words:long period fiber grating; few mode fiber; CO2 laser; Surrounding RI sensor

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 LPF

All the Authors:Qiuli Wang, Mei Sang*, Chenhao Zhong, Jie Dong

First Author:Qiuli Wang

Indexed by:Applied Research

Correspondence Author:Mei Sang

Document Code:1046408

Volume:10464

Page Number:1046408-1~6

Translation or Not:no

CN No.:null