High-resolution fiber-optic low-frequency voltage sensor based on the electrostrictive effect

A minimum detectable voltage of 40 nV/ square root Hz at 1 Hz is demonstrated in a fiber-optic interferometric low-frequency voltage sensor. The device maintains good resolution below 1 Hz, providing a minimum detectable voltage of 55 nV/ square root Hz at 0.1 Hz and 129 nV/ square root Hz at 0.03 H...

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Bibliographic Details
Published in:IEEE photonics technology letters 1993-08, Vol.5 (8), p.952-953
Main Authors: Fabiny, L., Vohra, S.T., Bucholtz, F.
Format: Article
Language:English
Subjects:
Applied sciences
Capacitive sensors
Ceramics
Circuit properties
Electric, optical and optoelectronic circuits
Electronics
Electrostriction
Exact sciences and technology
Frequency
General equipment and techniques
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Integrated optics. Optical fibers and wave guides
Optical and optoelectronic circuits
Optical fiber devices
Optical fiber sensors
Optical interferometry
Physics
Sensors, gyros
Signal resolution
Transducers
Voltage
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Summary:A minimum detectable voltage of 40 nV/ square root Hz at 1 Hz is demonstrated in a fiber-optic interferometric low-frequency voltage sensor. The device maintains good resolution below 1 Hz, providing a minimum detectable voltage of 55 nV/ square root Hz at 0.1 Hz and 129 nV/ square root Hz at 0.03 Hz. High resolution at low frequencies is attainable due to the nonlinear strain response of the electrostrictive transducer under an applied electric field, which upconverts low-frequency voltage signals as sidebands of a high-frequency carrier where 1/f noise is not dominant. The measured low-frequency data represent an improvement of >45 dB over previously reported results.< >
ISSN:1041-1135
1941-0174
DOI:10.1109/68.238266