A passive frequency noise insensitive fiber strain sensor using post processing
Date
2012
Authors
Lam, Timothy
Gray, Malcolm B
Shaddock, Daniel
McClelland, David
Chow, Jong
Journal Title
Journal ISSN
Volume Title
Publisher
SPIE - The International Society for Optical Engineering
Abstract
Laser frequency fluctuations limit the ultimate resolution in interferometric fiber sensors. In this work, we demonstrate an interferometric sensor insensitive to the effects of frequency change in an interrogating laser. A system is characterized showing a minimum of 4.5 orders of magnitude frequency change reduction, and a demonstrated broadband improvement of up to 1.5 orders of magnitude for signals between 100 mHz and 1 Hz. Using this technique a resolution of less than a nanostrain/rtHz was achieved for a broad range of frequencies.
Description
Keywords
Keywords: Fiber strain sensors; Frequency noise; Interferometric fiber sensors; Interferometric sensing; Interferometric sensor; Orders of magnitude; Post processing; Strain sensing; Interferometry; Fiber optic sensors Frequency noise mitigation; Interferometric sensing; Post processing; Strain sensing
Citation
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Source
Proceedings of SPIE - The International Society for Optical Engineering
Type
Conference paper