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Multiplexed interferometric displacement sensing below the laser frequency noise limit

Lam, Timothy; Wuchenich, Danielle; Chow, Jong; McClelland, David; Shaddock, Daniel

Description

The resolution of fiber optic interferometry sensors is often limited by frequency noise in the laser. For this reason, prestabilization techniques have been used to reduce laser frequency fluctuations and improve signal resolution. However, for multi-element systems this becomes cumbersome and difficult to implement. In this paper, we demonstrate the use of digitally-enhanced interferometry for the interrogation of a multi-element sensing system. Over 50 dB of cross-talk rejection was found,...[Show more]

CollectionsANU Research Publications
Date published: 2011
Type: Conference paper
URI: http://hdl.handle.net/1885/33216
Source: Proceedings of SPIE - The International Society for Optical Engineering
DOI: 10.1117/12.899431

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