An all-dielectric, 3-axis electric field sensor using quasi-longitudinally configured electro-optic crystals

We describe a stabilized, all-dielectric, 3-axis electric field sensor using electro-optic (EO) crystals. By directing the laser probe quasi-longitudinally with respect to the optic axis of the crystal, we have improved stability by three orders of magnitude and substantially reduced phase noise. Wh...

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Bibliographic Details
Published in:	2010 IEEE Sensors pp. 983 - 986
Main Authors:	Garzarella, Anthony, Dong Ho Wu, Crim, John B
Format:	Conference Proceeding
Language:	English
Published:	IEEE 01-11-2010
Subjects:	Earth Observing System Optical fiber sensors Optical fibers Optical noise Optical polarization
Online Access:	Get full text
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Summary:	We describe a stabilized, all-dielectric, 3-axis electric field sensor using electro-optic (EO) crystals. By directing the laser probe quasi-longitudinally with respect to the optic axis of the crystal, we have improved stability by three orders of magnitude and substantially reduced phase noise. While the modulation depth of the output signal is slightly reduced, overall sensitivity is greatly improved due to the larger signal to noise ratio. Unlike conventional EO sensors, measurements can be made with 50 meters of optical fibers without excessive noise. Additionally, the sensor and fibers can be moved during measurements without the need for compensation optics or recalibration. This makes the sensor very practical for actual field test applications and attractive for potential commercial use.
ISBN:	9781424481705 1424481708
ISSN:	1930-0395 2168-9229
DOI:	10.1109/ICSENS.2010.5690916