Research on the Birefringence Distribution of the Fiber Coil With Quadrupole Symmetrical Winding Method

When the polarization-maintaining fiber (PMF) delay coil of a fiber optic current transformer (FOCT) is impacted, external forces on the optical fibers and change of their birefringence may lead to extra phase errors during the propagation of optical signals in the fibers. These errors increase the error in current measurement. In the paper, the environmental impact mechanisms influencing the PMF delay coil of FOCT were investigated with a mathematical error model. The method of replacing PMF with a polarization-maintaining photonic crystal fiber (PCF) as the delay coil was proposed. Also, the relationship between structural parameters of air holes and linear birefringence of the polarization maintaining PCF subjected to stress was investigated. The structural parameters of optical fibers were also optimized subsequently. Simulated impact experiments of FOCT with polarization-maintaining PCF and PMF as the delay coil, respectively, demonstrated the effective impact resistance of FOCT with polarization-maintaining PCF delay coil after the optimization of its structural parameters. The current measurement errors of the FOCTs with polarization maintaining PCF delay coil reduced by approximately 35% with respect to the FOCT with PMF delay coil.

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“…Figure 2A shows the three-dimensional structure of the PMF delay coil [14]. Figure 2B shows the side structure of the delay coil.…”

Section: Figurementioning

confidence: 99%

An impact-insensitive fiber optic current transformer based on polarization maintaining photonic crystal fiber delay coil

et al. 2023

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High Spatial Resolution Distributed Birefringence Measurement in Km Level Length PM Fiber Based on Polarization OFDR

Lin,

Xie,

Yang

et al. 2024

J. Lightwave Technol.

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A Method for Suppressing Error of Fiber Optic Current Transformer Caused by Temperature Based on λ/4 Wave Plate Fabricated With Polarization-Maintaining Photonic Crystal Fiber

et al. 2023

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Research on the Birefringence Distribution of the Fiber Coil With Quadrupole Symmetrical Winding Method

Cited by 6 publications

References 24 publications

An impact-insensitive fiber optic current transformer based on polarization maintaining photonic crystal fiber delay coil

An impact-insensitive fiber optic current transformer based on polarization maintaining photonic crystal fiber delay coil

High Spatial Resolution Distributed Birefringence Measurement in Km Level Length PM Fiber Based on Polarization OFDR

A Method for Suppressing Error of Fiber Optic Current Transformer Caused by Temperature Based on λ/4 Wave Plate Fabricated With Polarization-Maintaining Photonic Crystal Fiber

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