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Proceedings Paper

Nonlinear distributed optical fiber sensing
Author(s): Alan J. Rogers
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Paper Abstract

Distributed optical-fiber sensing (DOFS) offers full information on the spatial and temporal behavior of a large number of measurand fields. Among potential applications are the monitoring and control of any large structure (including `smart' systems), and a range of environmental monitoring requirements. Methods for realizing DOFS hitherto have relied, almost exclusively, on linear backscatter techniques. A notable exception is the Raman temperature measurement system, which relies on non-linear backscatter. New explorations are concerned to investigate the possibility of utilizing other non-linear effects in either backscatter or forward-scatter arrangements. Forward-scatter methods utilize the non-linear interaction between counter-propagating light signals in a single-mode optical fiber; these hold promise for markedly improved signal levels, with consequent measurement accuracies of approximately 1%, and spatial resolutions approximately 0(DOT)1 m over distances up to 1 km. Attention recently has concentrated on the use of the optical Kerr effect. Two ways in which this effect may be used in DOFS are described. Recent experimental results are presented and remaining problems are defined.

Paper Details

Date Published: 5 March 1993
PDF: 13 pages
Proc. SPIE 1797, Distributed and Multiplexed Fiber Optic Sensors II, (5 March 1993); doi: 10.1117/12.141301
Show Author Affiliations
Alan J. Rogers, King's College London (United Kingdom)

Published in SPIE Proceedings Vol. 1797:
Distributed and Multiplexed Fiber Optic Sensors II
John P. Dakin; Alan D. Kersey, Editor(s)

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