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Proceedings Paper

Nonlinear methods for distributed optical fiber sensing
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Paper Abstract

Distributed optical-fiber sensing (DOFS) utilizes the unique advantages of the optical fiber as a passive, dielectric, flexible and one- dimensional measurement medium. It offers full spatial and temporal information concerning the behavior of a large range of measurand fields. Among the many potential application areas of DOFS are those in aerospace, petrochemicals, electricity supply, mining and civil engineering. Methods for realizing DOFS have hitherto concentrated on linear backscatter techniques in the fiber. New explorations to be described in this paper give the emphasis to nonlinear, forward-scatter techniques, and especially to two of these which rely on the optical Kerr effect. The primary advantage of this approach is a significantly improved spatial resolution, down to approximately equals 0.1. m. A description also will be given of a promising quasi-distributed (forward-scatter or backscatter) arrangement which used the (nonlinear) photosensitivity of fibers to devise a DOFS system for simultaneous quasi-distributed measurement of strain and temperature. Prospects for the future of DOFS technology will be reviewed.

Paper Details

Date Published: 30 November 1994
PDF: 13 pages
Proc. SPIE 2341, Interferometry '94: Interferometric Fiber Sensing, (30 November 1994); doi: 10.1117/12.195526
Show Author Affiliations
Alan J. Rogers, King's College London (United Kingdom)
Vincent A. Handerek, King's College London (United Kingdom)

Published in SPIE Proceedings Vol. 2341:
Interferometry '94: Interferometric Fiber Sensing
Eric Udd; Ralph P. Tatam, Editor(s)

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