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Proceedings Paper

Common-Mode Noise Reduction In Interferometric Fiberoptic Sensors Using Electrooptic Feedback
Author(s): A. B. Buckman; K. Park
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Paper Abstract

Common-mode perturbations are an important subset of the environmental variations which affect the accuracy and stability of interferometric fiberoptic sensors. These effects, among which are source wavelength drift and spatially uniform temperature and pressure variations, alter the phase shifts in each of the optical paths in the fiber circuit in proportion to the optical path length. Earlier work showed that a recirculating delay line fiberoptic sensor could be modified to compensate for common-mode perturbations, but at the cost of some loss in measurand sensitivity. In this paper, we employ transmittance-dependent electrooptic feedback in an enhanced Mach-Zehnder fiberoptic interferometer to compensate for common-mode perturbations, while enhancing by aproximately an order of magnitude the measurand sensitivity found in the conventional Mach-Zehnder fiber interferometer.

Paper Details

Date Published: 13 February 1990
PDF: 9 pages
Proc. SPIE 1169, Fiber Optic and Laser Sensors VII, (13 February 1990); doi: 10.1117/12.963018
Show Author Affiliations
A. B. Buckman, University of Texas (United States)
K. Park, University of Texas (United States)

Published in SPIE Proceedings Vol. 1169:
Fiber Optic and Laser Sensors VII
Ramon P. DePaula; Eric Udd, Editor(s)

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