Dispersion compensating fiber

G - Physics – 02 – B

Patent

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G02B 6/036 (2006.01) H04B 10/18 (2006.01)

Patent

CA 2344205

A dispersion compensating optical fiber, together with a single mode optical fiber with zero dispersion at a wavelength of about 1.3 microns, can compose an optical transmission line, which provides improved transmission characteristics and efficient dispersion compensation. The total dispersion slope of an optical transmission line is improved while the dispersion of a single mode optical fiber is well compensated for. The dispersion compensating optical fiber has a triply-cladded structure including first, second and third cladding layers applied in sequence over the core. The difference in relative index of refraction between regions as well as their outside diameters are optimized while the dispersion of the single mode optical fiber is compensated for so that an optical transmission system with a desirable total dispersion slope can be realized.

Une fibre optique à compensation de dispersion, associée à une fibre optique mono-mode à dispersion nulle pour une longueur d'ondes d'environ 1,3 µm peut composer une ligne de transmission, qui procure des caractéristiques de transmission améliorées et une compensation efficace de dispersion. La pente de dispersion totale d'une ligne de transmission optique est ainsi améliorée alors que la dispersion d'une fibre optique mono-mode est bien compensée. Cette fibre optique à compensation de dispersion présente une structure à triple revêtement faite d'une première couche, d'une deuxième couche et d'une troisième couche qui sont appliquées en séquence sur le coeur. La différence d'indices de réfraction relatifs entre régions ainsi que leurs diamètres extérieurs sont optimisés alors que la dispersion de la fibre optique mono-mode est compensée de façon que l'on arrive à réaliser un système de transmission optique présentant une pente de dispersion totale intéressante.

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