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

Lam, Timothy T.-Y.; Chow, Jong H.; Shaddock, Daniel A.; Littler, Ian C. M.; Gagliardi, Gianluca; Gray, Malcolm B.; McClelland, David E.


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 H13C14N absorption line is then used as a frequency reference to extract accurate low-frequency strain signals from the locked system.

CollectionsANU Research Publications
Date published: 2010-07-20
Type: Journal article
Source: Applied Optics
DOI: 10.1364/AO.49.004029


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