Experimental Evaluation of the Birefringence Effect on Faraday-Based Fiber-Optic Current Sensors

被引：4

作者：

Madaschi, Andrea ^{[1
]}

Brunero, Marco ^{[2
]}

Ferrario, Maddalena ^{[2
]}

Martelli, Paolo ^{[1
]}

Boffi, Pierpaolo ^{[1
]}

Martinelli, Mario ^{[1
]}

机构：

[1] Politecn Milan, Dipartimento Elettron Informaz & Bioingn, I-20133 Milan, Italy

[2] Cohaerentia Srl, I-20133 Milan, Italy

来源：

IEEE SENSORS LETTERS | 2022年 / 6卷 / 06期

关键词：

Optical fiber sensors; Optical fiber polarization; Sensors; Current measurement; Faraday effect; Bending; Sensitivity; Sensor integration; birefringence; fiber-optic current sensor (FOCS); Verdet constant;

D O I：

10.1109/LSENS.2022.3174079

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The results of an experimental investigation of the impact of the bending-induced linear birefringence on a fiber-optic current sensor are presented. A polarimetric configuration is used for measuring a 50-Hz ac current, exploiting the Faraday effect in a coil of standard optical fiber. Different values of diameter and number of turns of the coil are considered, evaluating the loss of sensitivity due to the birefringence as reduction of an effective value of the Verdet constant. It will be experimentally demonstrated that for a coil with a diameter sufficiently large, i.e., equal or larger than 14 cm, the effect of the linear birefringence plays only a marginal role and it can be neglected.

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页数：4

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