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Demonstration of a passive sub-picostrain fiber strain sensor

Jong H. Chow·Ian C. M. Littler·David E. McClelland·Malcolm B. Gray
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Abstract

We demonstrate a fiber Fabry-Perot (FFP) sensor capable of detecting sub-picostrain signals, from 100 Hz and extending beyond 100 kHz, using the Pound-Drever-Hall frequency locking technique. A low power diode laser at 1550 nm is locked to a free-space reference cavity to suppress its free-running frequency noise, thereby stabilizing the laser. The stabilized laser is then used to interrogate a FFP where the PDH error signal yields the instantaneous fiber strain.

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Jong H. Chow, Ian C. M. Littler, David E. McClelland, Malcolm B. Gray. 2005-04-11. Demonstration of a passive sub-picostrain fiber strain sensor. https://doi.org/10.1364/ol.30.001923

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