A coupling arrangement between a multi-mode light source and...

Details A coupling arrangement between a multi-mode light source and... A coupling arrangement between a multi-mode light source and...

G - Physics

02

B

G02B 6/42 (2006.01) G02B 6/26 (2006.01) H04B 10/16 (2006.01)

Patent

CA 2209127

A coupling arrangement for non-axial transfer of light power between a multi- mode light source (LS), having a substantially circu lar emission with a divergence angle .alpha.s, and a multi-mode optical fiber (FF) with a cross section Ac, through a length of an intermediate feeding multi-mode optical fiber (IF) having an end with cross section area Af coupled with said light source (LS) and one portion fused to said optical fiber (FF). Said feeding fiber (IF) has a progressively tapered portion and is fused to said multi-mode optical fiber (FF) at a region of the tapered fiber, and in that the relationship between the acceptance angle .alpha.f of the feeding fiber (IF) and the emission angle .alpha.s of the light source (LS) is expressed by: .alpha.f = k . .alpha.s where k is a positive constant greater than 1.

L'invention se rapporte à un agencement d'accouplement destiné au transfert non axial d'une énergie lumineuse entre une source de lumière multimode (LS), ayant une émission sensiblement circulaire avec un angle de divergence .alpha.s, et une fibre optique multimode (FF), ayant une section transversale Ac, au moyen d'une longueur d'une fibre optique multimode intermédiaire d'alimentation (IF) ayant une extrémité dont la surface de la section transversale Af est couplée à ladite source de lumière (LS) et dont une partie est réunie par fusion à la fibre optique (FF). La fibre optique d'alimentation (IF) possède une partie s'effilant en forme de cône et est réunie par fusion à la fibre optique multimode (FF) au niveau de la région conique de la fibre. La relation entre l'angle de réception .alpha.f de la fibre d'alimentation (IF) et l'angle d'émission .alpha.s de la source de lumière (LS) est exprimée sous la forme: .alpha.f = k . .alpha.s, k étant une constante positive supérieure à 1.

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