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Proceedings Paper

Single-crystal sapphire high-temperature sensor
Author(s): Yibing Zhang; Bing Qi; Yuhong Duan; Yan Zhang; Gary R. Pickrell; Russell G. May; Anbo Wang
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Paper Abstract

With a single-crystal sapphire disk as the sensing element, a broadband polarimetric interferometer (BPI) based high temperature sensor is presented. The state of polarization of the broadband incident light is modulated by the birefringence of the sapphire disk and becomes a wavelength-encoded signal, which is detected by an optical spectrum analyzer (OSA). From the detected optical spectrum, an internally developed algorithm is employed to measure the difference of optical paths between two orthogonal linearly polarized lights in the sapphire disk, which is uniquely determined by environment temperature. A wide dynamic measurement range (from room temperature up to 1600 degrees Celsius) with a resolution less than 1 degree(s)C and accuracy 0.26% full scale is achieved. The great advantages of this sensor are its simplicity and long-term stability in the harsh environment.

Paper Details

Date Published: 14 February 2002
PDF: 7 pages
Proc. SPIE 4578, Fiber Optic Sensor Technology and Applications 2001, (14 February 2002); doi: 10.1117/12.456072
Show Author Affiliations
Yibing Zhang, Virginia Polytechnic Institute and State Univ. (United States)
Bing Qi, Virginia Polytechnic Institute and State Univ. (United States)
Yuhong Duan, Virginia Polytechnic Institute and State Univ. (United States)
Yan Zhang, Virginia Polytechnic Institute and State Univ. (United States)
Gary R. Pickrell, Virginia Polytechnic Institute and State Univ. (United States)
Russell G. May, Virginia Polytechnic Institute and State Univ. (United States)
Anbo Wang, Virginia Polytechnic Institute and State Univ. (United States)


Published in SPIE Proceedings Vol. 4578:
Fiber Optic Sensor Technology and Applications 2001
Michael A. Marcus; Brian Culshaw, Editor(s)

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