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Proceedings Paper

A passive frequency noise insensitive fiber strain sensor using post processing
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Paper 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.

Paper Details

Date Published: 17 October 2012
PDF: 4 pages
Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84210V (17 October 2012); doi: 10.1117/12.968204
Show Author Affiliations
Timothy T.-Y. Lam, The Australian National Univ. (Australia)
Malcolm B. Gray, National Measurement Institute (Australia)
Daniel A. Shaddock, The Australian National Univ. (Australia)
David E. McClelland, The Australian National Univ. (Australia)
Jong H. Chow, The Australian National Univ. (Australia)

Published in SPIE Proceedings Vol. 8421:
OFS2012 22nd International Conference on Optical Fiber Sensors
Yanbiao Liao; Wei Jin; David D. Sampson; Ryozo Yamauchi; Youngjoo Chung; Kentaro Nakamura; Yunjiang Rao, Editor(s)

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