Optical waveguide having negative dispersion and large aeff

Details Optical waveguide having negative dispersion and large aeff Optical waveguide having negative dispersion and large aeff

G - Physics

02

B

G02B 6/036 (2006.01)

Patent

CA 2380720

The invention is directed to a single mode optical waveguide fiber profile (18, 20, 22, 24) that provides relatively large effective area while limiting macrobend loss. The large effective area results from configuring the core of the waveguide fiber to shift propagated light power away from the waveguide center. Macrobend loss, as measured by pin array or 20 mm mandrel testing, is maintained low by means of a power-limiting index depression (24) surrounding the central core region of the waveguide. In addition, low attenuation is achieved and cut off wavelength is controlled to provide a telecommunications operating window in the wavelength range of about 1250 nm to 1700 nm.

La présente invention concerne un profil de fibre guide d'onde optique monomode (18, 20, 22, 24) qui a une grande surface efficace tout limitant les pertes de macrocourbure. La grande surface efficace résulte d'une configuration du coeur de la fibre guide d'onde qui permet de projeter l'énergie lumineuse de propagation vers l'extérieur du centre de guide d'onde. Les pertes de macrocourbure, telles qu'elles sont mesurées par un essai de flexion ou de pliage 20 mm, sont réduites au moyen d'une dépression d'index de limitation de puissance (24) entourant la zone de coeur centrale du guide d'onde. De plus, une faible atténuation est obtenue et la longueur d'onde de coupure est contrôlée pour obtenir une plage de fonctionnement de télécommunications correspondant à des longueurs d'onde environ comprises entre 1250 nm et 1700 nm.

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