Control of dispersion in an optical waveguide

Details Control of dispersion in an optical waveguide Control of dispersion in an optical waveguide

H - Electricity

04

B

H04B 10/18 (2006.01) C03B 37/012 (2006.01) G02B 6/10 (2006.01)

Patent

CA 2221989

Disclosed is a single mode optical waveguide fiber having periodic perturbations (2) in the core to provide a birefringence which mixes the polarization modes of launched ligth. In addition, pertubations (4) are introduced into the core which serve to manage total dispersion. The total dispersion of preselected segments (6, 8) of the waveguide are caused to change sign so that the sum of products, total dispersion times length (13, 15), algebraically add to a preselected value. The two distinct core perturbation types serve to control both polarization mode dispersion and total dispersion. Methods for making the subject waveguide are also discussed.

Guide d'ondes optique monomode, présentant des perturbations périodiques (2) dans le coeur de la fibre qui entraînent une biréfringence, laquelle combine les modes de polarisation de la lumière transmise. En outre, des perturbations (4) introduites dans le coeur servent à gérer la dispersion totale. Le signe de la dispersion totale de segments présélectionnés (6, 8) du guide d'ondes est changé de sorte que la somme des produits, dispersion totale par longueur (13, 15), soit algébriquement égale à une valeur présélectionnée. Les deux types distincts de perturbation du coeur permettent de réguler à la fois la dispersion en mode de polarisation et la dispersion totale. Des procédés de fabrication du guide d'ondes précité sont également décrits.

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