High-temperature sensing applications of silica and sapphire optical fibers

Kent A. Murphy; C. E. Koob; Angela J. Plante; Seshu B. Desu; Richard O. Claus

doi:10.1117/12.24857

1 December 1990 High-temperature sensing applications of silica and sapphire optical fibers

Kent A. Murphy, C. E. Koob, Angela J. Plante, Seshu B. Desu, Richard O. Claus

Proceedings Volume 1370, Fiber Optic Smart Structures and Skins III; (1990) https://doi.org/10.1117/12.24857
Event: SPIE Microelectronic Interconnect and Integrated Processing Symposium, 1990, San Jose, United States

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.

Citation Download Citation

Kent A. Murphy, C. E. Koob, Angela J. Plante, Seshu B. Desu, and Richard O. Claus "High-temperature sensing applications of silica and sapphire optical fibers", Proc. SPIE 1370, Fiber Optic Smart Structures and Skins III, (1 December 1990); https://doi.org/10.1117/12.24857

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