DocumentCode :
1127625
Title :
Current sensing utilizing heterodyne detection of the Faraday effect in single-mode optical fiber
Author :
Kersey, Alan D. ; Jackson, David A.
Author_Institution :
Naval Research Laboratory, Washington, DC, USA
Volume :
4
Issue :
6
fYear :
1986
fDate :
6/1/1986 12:00:00 AM
Firstpage :
640
Lastpage :
644
Abstract :
A fiber-optic current sensor based on the Faraday effect is described which utilizes laser-diode frequency modulation in order to synthesize a heterodyne-type sensor output. The relative phase of the output carrier is directly modulated by the magnetically induced circular polarization mode-phase delay. Current sensing over three orders of magnitude is demonstrated, and a Verdet constant of 
rad/A (at 0.83μm) is reported for the fiber used.
rad/A (at 0.83μm) is reported for the fiber used.Keywords :
Current transducers; Faraday effect; Heterodyning; Optical fiber transducers; Faraday effect; Fiber lasers; Frequency modulation; Laser modes; Magnetic sensors; Optical fiber polarization; Optical fiber sensors; Optical fibers; Phase modulation; Sensor phenomena and characterization;
fLanguage :
English
Journal_Title :
Lightwave Technology, Journal of
Publisher :
ieee
ISSN :
0733-8724
Type :
jour
DOI :
10.1109/JLT.1986.1074778
Filename :
1074778
Link To Document :
