A personal tour of the fiber optic Sagnac interferometer

Eric Udd

doi:10.1117/12.819207

27 April 2009 A personal tour of the fiber optic Sagnac interferometer

Eric Udd

Proceedings Volume 7316, Fiber Optic Sensors and Applications VI; 73160R (2009) https://doi.org/10.1117/12.819207
Event: SPIE Defense, Security, and Sensing, 2009, Orlando, Florida, United States

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.

Citation Download Citation

Eric Udd "A personal tour of the fiber optic Sagnac interferometer", Proc. SPIE 7316, Fiber Optic Sensors and Applications VI, 73160R (27 April 2009); https://doi.org/10.1117/12.819207

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