Current sensor using heterodyne detection

José A. Ferrari; Alfredo Dubra; Alfredo Arnaud; Daniel Perciante

doi:10.1364/AO.38.002808

Current sensor using heterodyne detection

José A. Ferrari
, Alfredo Dubra
, Alfredo Arnaud
, Daniel Perciante

Facultad de Ingeniería (UdelaR)

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Based on the Faraday effect for measuring ac current, we describe a fiber-optic sensor that uses laserdiode 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.

Original language	English
Pages (from-to)	2808-2811
Number of pages	4
Journal	Applied Optics
Volume	38
Issue number	13
DOIs	https://doi.org/10.1364/AO.38.002808
State	Published - 1 May 1999
Externally published	Yes

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10.1364/AO.38.002808

Cite this

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title = "Current sensor using heterodyne detection",

abstract = "Based on the Faraday effect for measuring ac current, we describe a fiber-optic sensor that uses laserdiode 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.",

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AU - Ferrari, José A.

AU - Dubra, Alfredo

AU - Arnaud, Alfredo

AU - Perciante, Daniel

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N2 - Based on the Faraday effect for measuring ac current, we describe a fiber-optic sensor that uses laserdiode 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.

AB - Based on the Faraday effect for measuring ac current, we describe a fiber-optic sensor that uses laserdiode 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.

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Current sensor using heterodyne detection

Abstract

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