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Proceedings Paper

Fiberoptic sensing technique employing RF modulated interferometry
Author(s): John G. Eustace
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Paper Abstract

A detection technique for intensity type fiberoptic sensors is described. It employs a multimode fiber interferometer, with the sensor in one arm, excited by an LED modulated at RF frequencies fo and 2fo. Sensor induced changes in intensity result in corresponding changes in the ratio of the detected fo and 2fo signals, thus eliminating various common mode effects. Results obtained with a displacement sensor and preliminary results from a pressure sensor illustrate the capabilities of this technique.

Paper Details

Date Published: 1 December 1991
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Proc. SPIE 1584, Fiber Optic and Laser Sensors IX, (1 December 1991); doi: 10.1117/12.2321933
Show Author Affiliations
John G. Eustace, John Carroll Univ. (United States)


Published in SPIE Proceedings Vol. 1584:
Fiber Optic and Laser Sensors IX
Ramon P. DePaula; Eric Udd, Editor(s)

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