Microstructured optical fibres

G - Physics – 02 – B

Patent

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Details

G02B 6/00 (2006.01) B29D 11/00 (2006.01) C03B 37/012 (2006.01) C03B 37/027 (2006.01) C03B 37/028 (2006.01) C03B 37/075 (2006.01) G02B 6/02 (2006.01) G02B 6/032 (2006.01) G02B 6/10 (2006.01) G02B 6/122 (2006.01) H01S 3/067 (2006.01) H01S 5/10 (2006.01)

Patent

CA 2334510

The present invention relates to a new class of optical waveguides, in which waveguiding along one or more core regions is obtained through the application of the Photonic Bandgap (PBG) effect. The invention further relates to optimised two-dimensional lattice structures capable of providing complete PBGs, which reflects light incident from air or vacuum. Such structures may be used as cladding structures in optical fibres, where light is confined and thereby guided in a hollow core region. In addition, the present invention relates to designs for ultra low-loss PBG waveguiding structures, which are easy to manufacture. Finally, the present invention relates to a new fabrication technique, which allows easy manufacturing of preforms for photonic crystal fibers with large void filling fractions, as well as it allows a high flexibility in the design of the cladding and core structures.

Cette invention se rapporte à une nouvelle classe de guides d'ondes optiques, dans lesquels la fonction de guidage des ondes le long d'une ou de plusieurs zones âmes de la fibre est obtenue grâce à l'application de l'effet dit de bande interdite photonique (PBG). Cette invention se rapporte en outre à deux structures réticulaires bidimensionnelles optimisées, capables de produire des effets PBG complets, réfléchissant la lumière incidente dans un milieu contenant de l'air ou dans un milieu vide d'air. Ces structures peuvent servir de structures de gainage dans des fibres optiques, dans lesquelles la lumière est confinée et ainsi guidée dans une zone d'âme creuse. En outre, cette invention se rapporte à des conceptions de structures de guidage d'ondes à effet PBG à faible perte, qui sont faciles à fabriquer. Cette invention se rapporte enfin à une nouvelle technique de fabrication qui permet de fabriquer facilement des préformes de fibres à cristaux photoniques ayant de larges fractions de remplissage de vides, et qui permet également de profiter d'une grande flexibilité dans le conception du gainage et des structures d'âme.

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