Method and system for use in optical code division multiple...

H - Electricity – 04 – J

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H04J 14/00 (2006.01) G02F 1/35 (2006.01)

Patent

CA 2521103

A method and device (100A) are provided for automatically generating a key and a conjugate key to be used in an optical code division multiple access system. The method comprises applying a down conversion process to pump input light to thereby produce down converted broadband signal and idler fields (Ls, Li) that are complex conjugates of each other. The signal and idler fields thus serve as the key and its conjugate. Also provided according to the invention is a method for use in coding/decoding a signal in an optical code division multiple access system.

La présente invention concerne un procédé et un dispositif de génération automatique d'une clé et d'une clé conjuguée destinées à être utilisées dans un système d'accès multiple par code de répartition optique. Le procédé consiste à appliquer un procédé de conversion-réduction à de la lumière d'entrée de pompage pour produire ainsi un signal large bande converti-abaissé et des domaines'idler'' qui sont des conjugués complexes les uns des autres. Le signal et les domaines 'idler'' servent ainsi de clé et de conjugué de clé. Cette invention se rapporte également à un procédé destiné à être utilisé pour le codage/décodage d'un signal dans un système d'accès multiple par code de répartition optique.

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