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Proceedings Paper

Correlation-Optical-Time-Domain-Reflectometry For High Resolution Distributed Fiber-Optic Sensing
Author(s): Jean-Jacques Bernard; Emmanuel Depresles
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Paper Abstract

Distributed fiber-optic sensing systems require a spatial resolution of less than one meter, which cannot easily by reached by conventional optical-time-domain-reflectometry (OTDR), because of present electronics response times limited to about 10 ns. Correlation-Optical-Time-Domain-Reflectometry (COTDR) is a powerful technique for high resolution test of distributed single-mode fiber sensors in the long wavelength range 1.3-1.6μm. This paper describes the realization of a 1.3μm COTDR using a 200 Mb/s pseudo-random sequence which allows a spatial resolution of 50 cm, and gives results obtained on a short single-mode fiber length with localized defects simulating a distributed line of sensors.

Paper Details

Date Published: 23 March 1988
PDF: 4 pages
Proc. SPIE 0838, Fiber Optic and Laser Sensors V, (23 March 1988); doi: 10.1117/12.942508
Show Author Affiliations
Jean-Jacques Bernard, Laboratoires de Marcoussis (France)
Emmanuel Depresles, Laboratoires de Marcoussis (France)

Published in SPIE Proceedings Vol. 0838:
Fiber Optic and Laser Sensors V
Ramon P. DePaula; Eric Udd, Editor(s)

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