17 October 2012 A passive frequency noise insensitive fiber strain sensor using post processing
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Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 84210V (2012) https://doi.org/10.1117/12.968204
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China
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.
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Timothy T.-Y. Lam, Malcolm B. Gray, Daniel A. Shaddock, David E. McClelland, Jong H. Chow, "A passive frequency noise insensitive fiber strain sensor using post processing", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84210V (17 October 2012); doi: 10.1117/12.968204; https://doi.org/10.1117/12.968204
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