Refractive index and curvature sensitivity of LPFG inscribed in few-modes fiber

Qiuli Wang; Mei Sang; Chenhao Zhong; Jie Dong

doi:10.1117/12.2283308

24 October 2017 Refractive index and curvature sensitivity of LPFG inscribed in few-modes fiber

Qiuli Wang, Mei Sang, Chenhao Zhong, Jie Dong

Proceedings Volume 10464, AOPC 2017: Fiber Optic Sensing and Optical Communications; 1046408 (2017) https://doi.org/10.1117/12.2283308
Event: Applied Optics and Photonics China (AOPC2017), 2017, Beijing, China

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.

Citation Download Citation

Qiuli Wang, Mei Sang, Chenhao Zhong, and Jie Dong "Refractive index and curvature sensitivity of LPFG inscribed in few-modes fiber", Proc. SPIE 10464, AOPC 2017: Fiber Optic Sensing and Optical Communications, 1046408 (24 October 2017); https://doi.org/10.1117/12.2283308

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