23 April 2010 High-temperature fiber Bragg grating sensors in microstructured fibers for harsh environment applications
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Abstract
In this paper, we present fiber Bragg grating pressure sensors written in twin-hole microstructured fibers for high temperature operation above 800 °C. A Ti: Sapphire ultrafast laser is used to inscribe type II grating in two-hole optical fibers. The fiber Bragg grating resonance wavelength shift and peak splits are studied as a function of external hydrostatic pressure from 15 psi to 2000 psi. The ultrafast laser inscribed grating pressure sensor shows stable and reproducible operation above 800 °C. This paper demonstrates highly multiplexible pressure sensor technology for high temperature environment.
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Qingqing Wang, Charles M. Jewart, John Canning, Dan Grobnic, Stephen J. Mihailov, Kevin P. Chen, "High-temperature fiber Bragg grating sensors in microstructured fibers for harsh environment applications", Proc. SPIE 7677, Fiber Optic Sensors and Applications VII, 76770G (23 April 2010); doi: 10.1117/12.851778; https://doi.org/10.1117/12.851778
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