High-resolution absolute frequency referenced fiber optic sensor for quasi-static strain sensing

We present a quasi-static fiber optic strain sensing system capable of resolving signals below nanostrain from 20 mHz. A telecom-grade distributed feedback CW diode laser is locked to a fiber Fabry-Perot sensor, transferring the detected signals onto the laser. An H(13)C(14)N absorption line is then...

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Bibliographic Details
Published inApplied optics. Optical technology and biomedical optics Vol. 49; no. 21; p. 4029
Main Authors Lam, Timothy T-Y, Chow, Jong H, Shaddock, Daniel A, Littler, Ian C M, Gagliardi, Gianluca, Gray, Malcolm B, McClelland, David E
Format Journal Article
LanguageEnglish
Published United States 20.07.2010
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Summary:We present a quasi-static fiber optic strain sensing system capable of resolving signals below nanostrain from 20 mHz. A telecom-grade distributed feedback CW diode laser is locked to a fiber Fabry-Perot sensor, transferring the detected signals onto the laser. An H(13)C(14)N absorption line is then used as a frequency reference to extract accurate low-frequency strain signals from the locked system.
ISSN:2155-3165
DOI:10.1364/ao.49.004029