Laser frequency-noise-limited ultrahigh resolution remote fiber sensing
Date
2006-05-29
Authors
Chow, Jong
Littler, I C M
McClelland, David
Gray, Malcolm B
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Volume Title
Publisher
Optical Society of America
Abstract
When a fiber Fabry-Perot is used in an ultra-sensitive strain
detection system via a radio-frequency interrogation scheme, its frequency
discrimination properties can be enhanced by reducing the linewidth of
its resonance. This increases the signal-to-noise ratio, and thus suppresses
the strain equivalent noise floor. We demonstrate this improvement in a
long-distance high performance remote sensing system and show that in
reflection, it can mitigate the effects of random phase noise introduced by
Rayleigh back-scattering. In transmission, it improves the remote system
sensitivity to sub-picostrain resolution, which surpasses any other longdistance
remote sensing system to date. With the reduced fiber Fabry-Perot
linewidth, all noise sources in the delivery fiber become irrelevant, as the
transmission system is limited only by the pre-stabilized laser frequency
noise.
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Keywords
fiber optics sensors, remote sensing, interferometry
Citation
Optics Express 14.11 (2006): 4617-4624
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Source
Optics Express
Type
Journal article
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