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Opt Lett. 2006 Sep 1;31(17):2526-8.

Distributed strain measurement with millimeter-order spatial resolution based on Brillouin optical correlation domain analysis.

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  • 1Department of Electronic Engineering, Unviersity of Tokyo, Tokyo, Japan.


Distributed strain sensing with millimeter-order spatial resolution is demonstrated in optical fibers based on Brillouin optical correlation domain analysis. A novel beat lock-in detection scheme is introduced to suppress background noises coming from the reflection of Brillouin pump waves. The Brillouin frequency shifts of 3 mm fiber sections are successfully measured with a theoretical spatial resolution of 1.6 mm.

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