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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 38, Iss. 13 — May. 1, 1999
  • pp: 2808–2811

Current Sensor Using Heterodyne Detection

José A. Ferrari, Alfredo Dubra, Alfredo Arnaud, and Daniel Perciante  »View Author Affiliations


Applied Optics, Vol. 38, Issue 13, pp. 2808-2811 (1999)
http://dx.doi.org/10.1364/AO.38.002808


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Abstract

Based on the Faraday effect for measuring ac current, we describe a fiber-optic sensor that uses laser-diode intensity modulation to perform heterodyne signal detection. The sensor output at the carrier frequency is used as a reference signal to normalize the results. The sensing element consists of a few coils low-birefringence fibers between polarizers. We built the current sensor described above and tested its performance—sensitivity and noise—as functions of the angle between polarizers.

© 1999 Optical Society of America

Citation
José A. Ferrari, Alfredo Dubra, Alfredo Arnaud, and Daniel Perciante, "Current Sensor Using Heterodyne Detection," Appl. Opt. 38, 2808-2811 (1999)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-38-13-2808


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References

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