Wavelength multiplexing optical fibre transmission device

Details Wavelength multiplexing optical fibre transmission device Wavelength multiplexing optical fibre transmission device

H - Electricity

04

J

H04J 14/02 (2006.01) G02B 6/34 (2006.01) H04B 10/00 (2006.01)

Patent

CA 2402462

The invention concerns a wavelength multiplexing optical fibre transmission device comprising multiplexing means with optical combiner (16) consisting of a series of n optical couplers CO1, CO2, CO7 with asymmetric cascade distribution over several stages A, B, C for combining the optical signals received from the optical transmitters (14) of different wavelengths (.lambda.1 to .lambda.8). The last coupler CO7 routes the multiplexed optical signals to a main transmission line (18) and a standby transmission line (20). The coupling ratio of the various couplers is adjusted at the channels to compensate spectral gain variation of the optical amplifier (26), which is arranged on the receiver side before the optical demultiplexer (28). The invention is applicable to metropolitan area telecommunication networks.

Un dispositif de transmission à fibres optiques et à multiplexage en longueurs d'ondes, comprend des moyens de multiplexage à combineur optique (16) composé d'une série de n coupleurs optiques CO1, CO2,... CO7 à répartition dissymétrique en cascade sur plusieurs étages A, B, C... permettant de combiner les signaux optiques reçus des émetteurs optiques (14) de différentes longueurs d'ondes (.lambda.1 à .lambda.8). Le dernier coupleur CO7 achemine les signaux optiques multiplexés vers une ligne de transmission principale (18) et une ligne de transmission de secours (20). Le rapport de couplage des différents coupleurs optiques est ajusté au niveau des canaux pour compenser la variation du gain spectral de l'amplificateur (26) optique, lequel est disposé du côté récepteur avant le démultiplexeur optique (28). Applications: réseaux de télécommunications métropolitains.

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