A tapered rib waveguide

G - Physics – 02 – B

Patent

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Details

G02B 6/30 (2006.01) G02B 6/12 (2006.01) G02B 6/122 (2006.01)

Patent

CA 2274176

A tapered rib waveguide tapering from a large, multi-mode optical waveguide to a smaller, single-mode optical waveguide, the tapered rib waveguide comprising two portions (4, 5) formed of the same material: a lower portion (4) which tapers laterally from the large waveguide to the smaller waveguide and an upper portion (5) formed on the lower portion (4), which tapers to a point (or other form of termination), the dimensions of the two portions (4, 5) being such that substantially all of a fundamental mode propagated in the large multi-mode waveguide is coupled to the smaller, single-mode waveguide.

La présente invention concerne un guide d'onde conique en arête qui va en rétrécissant depuis un grand guide d'onde optique multimodal jusqu'à un guide d'onde optique monomodal plus petit, ledit guide d'onde conique en arête comprenant deux parties (4, 5) réalisées dans le même matériau: une partie inférieure (4) qui va en rétrécissant latéralement depuis le grand guide d'onde jusqu'au guide d'onde plus petit et une partie supérieure (5) formée sur la partie inférieure (4), qui va en rétrécissant jusqu'à former un point (ou tout autre forme de terminaison), les dimensions de ces deux parties (4, 5) étant telles que pratiquement tout le mode dominant propagé dans le grand guide d'onde multimodal se trouve couplé au guide d'onde monomodal plus petit.

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