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Proceedings Paper

A personal tour of the fiber optic Sagnac interferometer
Author(s): Eric Udd
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Paper Abstract

It has been over 30 years since the first fiber optic Sagnac interferometer was demonstrated by Vali and Shorthill in 1976 and the invention of the closed loop fiber optic gyro by Udd and Cahill in 1977. In these years the Sagnac interferometer in the form of the fiber optic gyro became and remains perhaps the most successful fiber optic sensor development. However it is not the only application of the fiber optic Sagnac interferometer and this paper is a personal tour of some other applications that include its usage for acoustic, strain, vibration, distributed sensing, intrusion detection and intrusion prevention. This paper is not intended to be a compressive review of the fiber optic Sagnac interferometer, instead it is a brief overview of a personal effort to develop fiber optic sensors and intrusion resistant communications systems based on this amazing interferometer with the help of friends at McDonnell Douglas, Blue Road Research, Columbia Gorge Research and a great deal of input from researchers worldwide.

Paper Details

Date Published: 27 April 2009
PDF: 10 pages
Proc. SPIE 7316, Fiber Optic Sensors and Applications VI, 73160R (27 April 2009); doi: 10.1117/12.819207
Show Author Affiliations
Eric Udd, Columbia Gorge Research (United States)

Published in SPIE Proceedings Vol. 7316:
Fiber Optic Sensors and Applications VI
Eric Udd; Henry H. Du; Anbo Wang, Editor(s)

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