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Fiber Optic Current Sensor Based on Special Spun Highly Birefringent Fiber

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7 Author(s)
Nai Peng ; Wuhan Nat. Lab. for Optoelectron., HUST, Wuhan, China ; Yong Huang ; Shuangbao Wang ; Tao Wen
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A fiber optic current sensor based on a polarization-rotated reflected interferometer has been constructed. A special spun highly birefringent fiber is designed and achieved for the sensor by heating and spinning commercial linearly birefringent fiber. In contrast with conventional fibers, the fiber integrates a function of a quarter wave plate. Particularly, fabricating and working principle of the current sensor head using the fiber are expounded. The sensor achieves an accuracy with 0.5% and good linearity shown in temperature dependence (a temperature drift of 0.008%/ °C) over a temperature range 40 °C -70 °C. Further, under simple temperature compensation, the sensor accuracy is within ±0.1% over in a wide range of current and temperature ranges.

Published in:

Photonics Technology Letters, IEEE  (Volume:25 ,  Issue: 17 )

Date of Publication:

Sept.1, 2013

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