Ms. Qiuli Wang Profile

Qiuli Wang

at Tianjin Univ

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Proceedings Article | 24 October 2017 Paper

Temperature sensitivity of LPFG inscribed in few modes fiber

Jie Dong, Mei Sang, Qiuli Wang, Chenhao Zhong

Proceedings Volume 10464, 104640E (2017) https://doi.org/10.1117/12.2283518

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A LPFG with a period of 145μm has been successfully inscribed in the few modes fiber (FMF) by CO₂ laser-irradition method. The mode coupling theory indicates that the first two resonant wavelengths of the LPFG attribute to the mode coupling between the core mode LP₀₁ and the cladding modes LP_0,21 and LP_0,22. The third one is the result of the coupling between the higher-order core mode LP₀₂ and cladding mode LP_0,29 or LP_0,30. These resonant wavelengths shift in different direction with the increasing temperature, and the experimental results show their temperature sensitivity are 66.54pm/°C,90.36pm/°,115.1pm/°, respectively

Proceedings Article | 24 October 2017 Paper

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

Qiuli Wang, Mei Sang, Chenhao Zhong, Jie Dong

Proceedings Volume 10464, 1046408 (2017) https://doi.org/10.1117/12.2283308

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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.

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