System for transmitting soliton signals via optical fibre...

Details System for transmitting soliton signals via optical fibre... System for transmitting soliton signals via optical fibre...

H - Electricity

04

J

H04J 14/02 (2006.01) H04B 10/12 (2006.01) H04B 10/18 (2006.01)

Patent

CA 2248890

The invention relates to a system for transmitting soliton signals via optical fibre with wavelength-division multiplexing, in which the wavelengths (.lambda.1 to .lambda.n) of the different multiplex channels are selected so that at at least one point of the transmitting system the difference between the bit times of two multiplex channels is substantially a submultiple T/N of the clock period. The invention proposes to place at the said point a synchronous modulator to modulate the soliton signals at a frequency N/T multiple of the clock frequency of the solitons 1/T. In a frequency allocation arrangement ensuring synchronicity of the channel bit times with an interval of ZR, all channels can thus be modulated at intervals submultiples ZR. at modulation frequencies multiples of the clock frequency.

L'invention concerne un système de transmission à fibre optique à signaux solitons et à multiplexage de longueur d'onde, dans lequel les longueurs d'onde (.lambda.1 à .lambda.n) des différents canaux du multiplex sont choisies de sorte à ce qu'en au moins un point du système de transmission, la différence entre les temps bits de deux canaux du multiplex est sensiblement un sous multiple T/N de la période d'horloge. L'invention propose de disposer en ce point un modulateur synchrone pour moduler les signauxsolitons à une fréquence N/T multiple de la fréquence d'horloge des solitons 1/T. Dans un schéma d'allocation des fréquences assurant la synchronicité des temps bit des canaux avec un intervalle Z R. on peut ainsi moduler l'ensemble des canaux à des intervalles sous multiples Z R. à des fréquences de modulation multiples de la fréquence d'horloge.

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