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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 7 — Mar. 1, 2003
  • pp: 1175–1181

Transmission-reflection analysis for localization of temporally successive multipoint perturbations in a distributed fiber-optic loss sensor based on Rayleigh backscattering

Vasilii V. Spirin  »View Author Affiliations


Applied Optics, Vol. 42, Issue 7, pp. 1175-1181 (2003)
http://dx.doi.org/10.1364/AO.42.001175


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Abstract

A novel method is presented for the localization of multipoint loss-inducing perturbations in a distributed fiber-optic sensor. The proposed simple technique is based on measurement of the transmitted and the Rayleigh-backscattered powers of an unmodulated light launched into a sensing fiber. The positions of consecutive perturbations are determined by measuring the slopes of the dependence of normalized Rayleigh-backscattering power versus the square of normalized transmitted power. It is shown that these slopes uniquely depend on the positions of the disturbances along the test fiber. The method allows localization of any number of the perturbations that appear one after another at different positions along the test fiber without ambiguity. Good agreement is obtained between calculated and experimentally measured slopes for a loss that was consecutively induced near the source and remote ends of 2.844-km-long fiber.

© 2003 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.2430) Fiber optics and optical communications : Fibers, single-mode
(290.5870) Scattering : Scattering, Rayleigh

History
Original Manuscript: June 18, 2002
Revised Manuscript: November 18, 2002
Published: March 1, 2003

Citation
Vasilii V. Spirin, "Transmission-reflection analysis for localization of temporally successive multipoint perturbations in a distributed fiber-optic loss sensor based on Rayleigh backscattering," Appl. Opt. 42, 1175-1181 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-7-1175


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