Polarisation preserving optical fibre

G - Physics – 02 – B

Patent

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Details

G02B 6/02 (2006.01) G02B 6/024 (2006.01) G02B 6/10 (2006.01) G02B 6/122 (2006.01)

Patent

CA 2368789

A micro-structured optical fibre having a cladding comprising a number of elements having a non-circular cross-section. Each element has at least one part extending outside a circle having the same cross-sectional area as the element. These extending parts are directed in the same direction. This cladding structure provides polarisation preserving properties to the optical fibre. Optical fibres using this technology may have claddings with elements placed non-periodically as well as in a two-dimensional periodic lattice - such as cladding providing Photonic Band Gap (PBG) effects.

La présente invention concerne une fibre optique à microstructure qui possède un gainage comprenant un certain nombre d'éléments de coupe transversale non circulaire. Chaque élément possède au moins une partie qui s'étend à l'extérieur d'un cercle et qui possède la même coupe transversale que cet élément. Ces parties sont dirigées dans la même direction. Cette structure de gainage possède des propriétés permettant de préserver la polarisation de la fibre optique. Les fibres optiques qui utilisent cette technologie peuvent posséder des gainages pourvus d'éléments placés de façon non-périodique ou placés dans un treillis périodique bidimentionnel tel qu'un gainage à effets de bande interdite photonique (PBG).

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