A temperature insensitive variable-rate spun fiber sensing coil applied in fiber optic current transformer

Wei Gao; Hongze Gao; Guochen Wang; Yongguang Wang; Yuxin Zhao

doi:10.1117/12.2625859

27 March 2022 A temperature insensitive variable-rate spun fiber sensing coil applied in fiber optic current transformer

Wei Gao, Hongze Gao, Guochen Wang, Yongguang Wang, Yuxin Zhao

Author Affiliations +

Proceedings Volume 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications; 12169A9 (2022) https://doi.org/10.1117/12.2625859
Event: Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 2021, Kunming, China

Abstract

When the λ/4 waveplate of fiber optic current transformer (FOCT) is set in the variable temperature environment, there will be a polarization error during the process of optical signal propagating in the fiber, which will decrease the accuracy of current measurement. In this paper, in order to reduce the influence of temperature change on the accuracy of current measurement, we firstly analyzed the influence mechanism of temperature change on λ/4 waveplate in FOCT, and then used a variable-rate spun fiber (VRSF) as a sensing coil instead of a λ/4 waveplate with circular polarization maintaining fiber (CPMF) as a sensing coil. After that, the mechanism of temperature insensitivity of VSSF was explained. Finally, the two FOCT systems with different fiber sensing coils were tested under variable environment, which proved that the fiber sensing coil using the VSSF in FOCT can effectively resist the interference of the external environment temperature change. As a result, the accuracy of current measurement can be kept within 0.2S degree under the variable temperature environment of -20-70°C.

Citation Download Citation

Wei Gao, Hongze Gao, Guochen Wang, Yongguang Wang, and Yuxin Zhao "A temperature insensitive variable-rate spun fiber sensing coil applied in fiber optic current transformer", Proc. SPIE 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 12169A9 (27 March 2022); https://doi.org/10.1117/12.2625859

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