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Proceedings Paper

High-temperature sensing applications of silica and sapphire optical fibers
Author(s): Kent A. Murphy; C. E. Koob; Angela J. Plante; Seshu B. Desu; Richard O. Claus
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Paper Abstract

Two silica fiber strain sensors are presented and their capabilities at high temperatures are demonstrated. A silica fiber extrinsic Fabry-Perot strain sensor is demonstrated with nanometer resolution at temperatures up to 975 C. The second silica-based fiber sensor is an intensity-based strain sensor constructed by placing two multimode fibers inside a hollow silica tube. As the gap between the endfaces of the fibers changes, the intensity of the output optical power varies depending on the longitudinal misalignment. SiO2 was deposited using a CVD method to form a cladding on commercially-available sapphire rods. The sapphire optical fiber was used to build a displacement sensor.

Paper Details

Date Published: 1 December 1990
PDF: 10 pages
Proc. SPIE 1370, Fiber Optic Smart Structures and Skins III, (1 December 1990); doi: 10.1117/12.24857
Show Author Affiliations
Kent A. Murphy, Virginia Polytechnic Institute and State Univ. (United States)
C. E. Koob, Virginia Polytechnic Institute and State Univ. (United States)
Angela J. Plante, Virginia Polytechnic Institute and State Univ. (United States)
Seshu B. Desu, Virginia Polytechnic Institute and State Univ. (United States)
Richard O. Claus, Virginia Polytechnic Institute and State Univ. (United States)


Published in SPIE Proceedings Vol. 1370:
Fiber Optic Smart Structures and Skins III
Richard O. Claus; Eric Udd, Editor(s)

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