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Fiber Bragg grating vacuum sensors

Appl. Phys. Lett. 87, 234101 (2005); doi:10.1063/1.2140082

Published 28 November 2005

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Ben McMillen, Chuck Jewart, Michael Buric, and Kevin P. Chen
Department of Electrical and Computer Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261

Yuankun Lin
Department of Physics and Geology, University of Texas-Pan American, Edinburg, Texas 78541

Wei Xu
StockerYale, Inc., Salem, New Hamphire 03079
This letter demonstrates functional enhancements of fiber Bragg grating sensors powered by in-fiber light. High-power laser light transmitted in double-clad optical fiber was extracted from the fiber core to heat an on-fiber metal coating. When the power-laser is turned off, the fiber Bragg grating is used as a passive component for temperature sensing. When the laser is turned on, the thermal response of the optically heated grating was used to monitor ambient air pressure. The sensitivity and dynamic range of optically powered fiber sensors can be actively adjusted by in-fiber light to measure vacuum pressures over four orders of magnitude. ©2005 American Institute of Physics
History: Received 16 May 2005; accepted 24 October 2005; published 28 November 2005
Permalink: http://link.aip.org/link/?APPLAB/87/234101/1
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ISSN:
0003-6951 (print)   1077-3118 (online)
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