H - Electricity – 04 – J
Patent
H - Electricity
04
J
H04J 14/02 (2006.01) H04B 10/02 (2006.01) H04B 10/18 (2006.01)
Patent
CA 2239083
The invention concerns a system for fibre optic transmission with soliton signals and wavelength multiplexing, in which the bit times of the different channels (.lambda.1 to .lambda.n) of the multiplex are substantially synchronous at at least one point, which is distinguished by at least one saturable absorbent being located at the said point. Synchronism of the channels can be achieved by appropriate use of wavelengths or by the use of means such as optical delay lines. Thus the saturable absorbent modulates the intensity of the soliton signals of the various channels of the multiplex. A clock can be used for off-site control of the saturable absorbent. The invention also concerns a corresponding transmission process. The invention allows long-range transmission without the use of active components.
L'invention concerne un système de transmission à fibre optique à signaux solitons et à multiplexage de longueur d'onde, dans lequel les temps bit des différents canaux (.lambda.1 à .lambda.n) du multiplex sont sensiblement synchrones en au moins un point, qui est caractérisé par au moins un absorbant saturable disposé audit point. La synchronicité des canaux peut être obtenue par un choix judicieux des longueurs d'ondes, ou à l'aide de moyens tels des lignes à retard optique. L'absorbant saturable module alors en intensité les signaux solitons des différents canaux du multiplex. On peut utiliser une horloge pour assurer le pilotage à distance de l'absorbant saturable. L'invention concerne aussi un procédé de transmission correspondant. L'invention permet une transmission à grande distance sans utilisation de composants actifs.
Alcatel
Alcatel Alsthom Compagnie Generale D'electricite
Robic
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