Nonlinear methods for distributed optical fiber sensing

Alan J. Rogers; Vincent A. Handerek

doi:10.1117/12.195526

30 November 1994 Nonlinear methods for distributed optical fiber sensing

Alan J. Rogers, Vincent A. Handerek

Proceedings Volume 2341, Interferometry '94: Interferometric Fiber Sensing; (1994) https://doi.org/10.1117/12.195526
Event: International Conference on Interferometry '94, 1994, Warsaw, Poland

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.

Citation Download Citation

Alan J. Rogers and Vincent A. Handerek "Nonlinear methods for distributed optical fiber sensing", Proc. SPIE 2341, Interferometry '94: Interferometric Fiber Sensing, (30 November 1994); https://doi.org/10.1117/12.195526

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