A passive frequency noise insensitive fiber strain sensor using post processing

Timothy T.-Y. Lam; Malcolm B. Gray; Daniel A. Shaddock; David E. McClelland; Jong H. Chow

doi:10.1117/12.968204

17 October 2012 A passive frequency noise insensitive fiber strain sensor using post processing

Timothy T.-Y. Lam, Malcolm B. Gray, Daniel A. Shaddock, David E. McClelland, Jong H. Chow

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.

Citation Download Citation

Timothy T.-Y. Lam, Malcolm B. Gray, Daniel A. Shaddock, David E. McClelland, and 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); https://doi.org/10.1117/12.968204

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