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Proceedings Paper

Temperature sensing by band gap optical absorption in semiconductors
Author(s): Michel F. Sultan; Michael J. O'Rourke
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Paper Abstract

A new sensor for measuring high temperature in harsh environments is presented. The sensor concept is based on the fact that the band gap energy of semiconductors, and accordingly the cut-on optical wavelength, depend strongly on temperature. The optical wavelength at which these semiconductors start transmitting light typically increases as the temperature increases. Durable optical fibers transmit light to and from the semiconductive material. This paper addresses the feasibility of the concept at temperatures up to 800 degrees Celsius, and presents results using different semiconductors including gallium arsenide, silicon, and gallium phosphide.

Paper Details

Date Published: 25 October 1996
PDF: 12 pages
Proc. SPIE 2839, Fiber Optic and Laser Sensors XIV, (25 October 1996); doi: 10.1117/12.255352
Show Author Affiliations
Michel F. Sultan, General Motors Research and Development Ctr. (United States)
Michael J. O'Rourke, General Motors Research and Development Ctr. (United States)


Published in SPIE Proceedings Vol. 2839:
Fiber Optic and Laser Sensors XIV
Ramon P. DePaula; John W. Berthold, Editor(s)

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