A broadband Faraday fiber-optic current sensor with excess noise compensation

被引：8

作者：

Gubin, V. P. ^{[1
]}

Przhiyalkovskiy, Y., V ^{[1
]}

Starostin, N., I ^{[1
]}

Morshnev, S. K. ^{[1
]}

Sazonov, A., I ^{[1
]}

机构：

[1] Russian Acad Sci, Fryazino Branch, Kotelnikov Inst Radio Engn & Elect, Fryazino 141190, Moscow Region, Russia

来源：

RESULTS IN PHYSICS | 2020年 / 18卷

关键词：

Faraday effect; Fiber-optic current sensor; Excess noise; GYROSCOPE; SUPPRESSION;

D O I：

10.1016/j.rinp.2020.103286

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A Faraday fiber-optic current sensor with suppression of excess noise produced by a low-coherent light source is presented. The sensor is designed to detect short current pulses and represents an in-line interferometer with a sensing element based on a spun highly birefringent fiber. To suppress the excess noise, a two-channel light detection scheme without an additional delay line is applied. It is established that bending birefringence induced in the spun fiber wound on a coil limits the noise suppression. To minimize this effect, a new geometry of the sensing coil is used. The proposed sensor exhibits a 5-fold improvement of the signal-to-noise ratio and the same enhancement of the sensitivity to a value of 0.8A in the 3.5 MHz bandwidth. The minimum duration of the measured current pulse is 200 ns.

引用

页数：4

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