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JOURNALS // Kvantovaya Elektronika // Archive

Kvantovaya Elektronika, 2018 Volume 48, Number 3, Pages 275–282 (Mi qe16784)

This article is cited in 3 papers

Fibre-optic sensors

Temperature evolution of interferometer visibility in a small radius fibre coil current sensor

S. K. Morshnev, V. P. Gubin, N. I. Starostin, Ya. V. Przhiyalkovskiy, A. I. Sazonov

Kotelnikov Institute of Radioengineering and Electronics, Fryazino Branch, Russian Academy of Sciences

Abstract: We have experimentally demonstrated periodic oscillations of interferometer visibility in a current sensor in response to changes in the temperature of a small-radius spun fibre sensing coil. The observed effect has been shown to depend on the magnitude of the bend-induced linear birefringence in the spun fibre in the magnetically sensitive coil and the temperature behaviour of the built-in linear birefringence in the fibre. Using a model that considers a helical structure of the built-in linear birefringence axes in spun fibre, we have shown that the above factors result in periodic oscillations of the ellipticity of polarised light at the ends of the sensing coil and that this underlies the temperature oscillations of interferometer visibility in the current sensor. The effect may cause errors in the response of a fibre-optic current sensor with a small sensing coil.

Keywords: fibre-optic current sensor, spun fibre, interference visibility, ellipticity angle of polarisation states, fibre bend radius in a magnetically sensitive coil.

Received: 20.11.2017
Revised: 19.01.2018


 English version:
Quantum Electronics, 2018, 48:3, 275–282

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© Steklov Math. Inst. of RAS, 2025