Bow-tie holes-aided elliptical-core polarization-maintaining fiber with high birefringence

In this paper, the sensor was proposed by combination of grapefruit photonic crystal fiber (GPCF) and femtosecond laser fabricated fiber Bragg grating (FBG) based on Sagnac interferometer. The GPCF was sandwiched between two single-mode fibers (SMFS) to form a SMF-GPCF-SMF structure, which was based on intermodal interference. The FBG with a central wavelength of 1535.32 nm was inscribed through polyimide coating and cladding by the femtosecond laser point-by-point inscribing method. The spectrum drift data of sensing structure were collected and the dual-parameters matrix of temperature-strain was constructed to realize the simultaneous measurement of temperature and strain. The experimental results showed that the linear range of the strain measurement was from 0 με to 2,000 με at different temperature, the wavelength of FBG and GPCF was red drift and blue drift, respectively, the average strain sensitivity at different temperature was 1.25 pm/με and -2.05 pm/με, all the linearity R2 are higher than 0.999, and has the high repeatability. The linear range of temperature measurement was from 20 ℃ to 450 ℃, the wavelength of FBG and GPCF was red drift and blue drift, respectively, the temperature sensitivity of FBG and GPCF was 15.17 pm/℃ and -8.87 pm/℃, the linearity was 0.99983 and 0.99989, respectively.

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椭圆芯类矩形保偏光纤的设计及其双折射特性

Zhu Yuxue,

Chen Dongying,

Zhao Qiang

et al. 2023

光学学报

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Bow-tie holes-aided elliptical-core polarization-maintaining fiber with high birefringence

Cited by 3 publications

References 38 publications

Study of stress dichroism of the thin-wall hollow core fiber based on geometric nonlinearity model

Study of stress dichroism of the thin-wall hollow core fiber based on geometric nonlinearity model

High temperature and strain dual-parameters fiber sensing based on intermodal interference and femtosecond laser fabricated fiber Bragg grating

椭圆芯类矩形保偏光纤的设计及其双折射特性

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