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Proceedings Paper

A Simple Fiber Optic Thermal Switch Or Fire Alarm
Author(s): M. Luukkala; J. Viirto
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Paper Abstract

We describe a simple and inexpensive fiber optic thermal switch which gives an alarm if temperature exceeds a threshold determined by the material at the fiber end tip.The effect is based on the melting of suitable waxes where the back scattering of light vanishes when the critical threshold temperature is reached. The present device has many attractive features: it is uncomplicated, is based on a "solid state effect", is totally dielectric, and has an excellent long term stability.

Paper Details

Date Published: 14 October 1987
PDF: 4 pages
Proc. SPIE 0798, Fiber Optic Sensors II, (14 October 1987); doi: 10.1117/12.941132
Show Author Affiliations
M. Luukkala, University of Helsinki (Finland)
J. Viirto, University of Helsinki (Finland)


Published in SPIE Proceedings Vol. 0798:
Fiber Optic Sensors II
Anna Maria Verga Scheggi, Editor(s)

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