Optical coupling system

Details Optical coupling system Optical coupling system

G - Physics

02

B

G02B 6/26 (2006.01)

Patent

CA 2292806

An optical coupling system for providing an output beam of light which is collimated, is disclosed wherein a length of single mode optical first fibre having a first outer diameter is optically coupled with an end face of a second optical fibre lens having a graded index region about a longitudinal optical axis of the lens. The second optical fibre lens has a same outer diameter as the first optical fibre. The ratio of the diameter of the graded index region of second optical fibre lens to the diameter of the core of the first optical fibre is 6.5:1 or greater. Conveniently, as the diameters of the fibre and the fibre lens are the same, they can be placed inside a sleeve such as a connector ferrule to provide a collimated beam at an output end. The lens and fibre can be joined by fusion, adhesive or within a sleeve can be spaced apart.

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