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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 6 — Feb. 20, 2011
  • pp: 924–929

High sensitivity optical fiber current sensor based on polarization diversity and a Faraday rotation mirror cavity

Hongying Zhang, Yongkang Dong, Jesse Leeson, Liang Chen, and Xiaoyi Bao  »View Author Affiliations

Applied Optics, Vol. 50, Issue 6, pp. 924-929 (2011)

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A novel high sensitivity optical fiber current sensor (OFCS) based on polarization diversity and a Faraday rotation mirror cavity is proposed and demonstrated. Comparing with single-channel detection in a conventional OFCS, a signal power gain of 6 dB and a signal-to-noise ratio improvement of over 30 dB have been achieved in the new scheme. The cavity amplifies magnetic field-induced nonreciprocal phase modulation, while the Faraday rotation mirrors suppress the reciprocal birefringence. A linear response is obtained for current amplitude as low as several mA at an AC frequency of 1 kHz .

© 2011 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: October 14, 2010
Revised Manuscript: January 3, 2011
Manuscript Accepted: January 9, 2011
Published: February 17, 2011

Hongying Zhang, Yongkang Dong, Jesse Leeson, Liang Chen, and Xiaoyi Bao, "High sensitivity optical fiber current sensor based on polarization diversity and a Faraday rotation mirror cavity," Appl. Opt. 50, 924-929 (2011)

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