Otdr arrangement for detecting faults in an optical...

Details Otdr arrangement for detecting faults in an optical... Otdr arrangement for detecting faults in an optical...

H - Electricity

04

B

H04B 10/00 (2006.01) H04B 10/08 (2006.01) H04B 10/16 (2006.01)

Patent

CA 2496237

A method is provided for using optical time-domain reflectometry (OTDR) with a bi-directional optical transmission system that includes a plurality of terminals (200,202) interconnected by first (206) a second (208) unidirectional optical transmission paths having at least one repeater (222) therein. The method begins by transmitting a probe signal from a first terminal through the repeater over the first optical transmission path. A returned OTDR signal is received over the first optical transmission path in which status information concerning the first optical transmission path is embodied. The returned OTDR signal is transformed to a digitized electrical signal and the digitized electrical signal is transformed to an optical data signal. Finally, the optical data signal is transmitted over the second optical transmission path to the first terminal for extracting the status information embodied therein.

L'invention concerne un procédé utilisant la réflectométrie optique (OTDR) avec un système de transmission optique bidirectionnel comportant une pluralité de bornes reliées entre elles par une première et une seconde voie de transmission optique unidirectionnelle équipée d'au moins un répéteur. Le procédé consiste à transmettre un signal de sonde, à partir d'une première borne, par le répéteur, sur la première voie de transmission optique. Un signal OTDR contenant des informations d'état relatives à la première voie de transmission optique est renvoyé sur la première voie de transmission optique. Ce signal OTDR est transformé en un signal électrique numérique qui est par la suite transformé en un signal de données optique. Finalement, le signal de données optique est transmis à la première borne, sur la seconde voie de transmission, pour que les informations d'état soient extraites.

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