Method and system for removal of low order optical...

H - Electricity – 04 – B

Patent

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H04B 10/13 (2006.01)

Patent

CA 2324468

A method of improving modal bandwidth in computer networks using multimode optical fiber and single mode sources is disclosed in which the optical signal from a center of the optical fiber is prevented from reaching the detector. This is accomplished according to a number of different techniques including the use of opaque spots on the fiber media/fiber couplers or the use of dark-cored fiber couplers. These configurations prevent pulse splitting that occurs in single mode source/multimode fiber systems by preventing light from the multimode fiber's center from interfering with the detector. When this is achieved, the detector is insulated from the effects of pulse splitting, supporting increased data rates by increasing the modal bandwidth.

L'invention concerne un procédé d'augmentation de la largeur de bande modale dans des réseaux informatiques utilisant une fibre optique multimodale et des sources à mode unique. Ce procédé consiste à empêcher le signal optique provenant du centre de la fibre optique de parvenir jusqu'au détecteur. On obtient ce résultat par plusieurs techniques différentes, parmi lesquelles l'utilisation de points opaques sur les supports/coupleurs de fibres ou l'utilisation de coupleurs de fibre à centre sombre. Ces configurations empêchent le dégroupement d'impulsion qui se produit dans les systèmes combinant une source à mode unique et une fibre multimodale, en empêchant la lumière du centre de la fibre multimodale d'interférer avec le détecteur. Cette opération permet d'isoler le détecteur des effets de dégroupement d'impulsion et lui permet de supporter des débits binaires accrus grâce à l'augmentation de la largeur de bande modale.

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