Optical-fiber coupler and manufacturing process therefor

Details Optical-fiber coupler and manufacturing process therefor Optical-fiber coupler and manufacturing process therefor

G - Physics

02

B

G02B 6/26 (2006.01) G02B 6/27 (2006.01) G02B 6/28 (2006.01)

Patent

CA 2210611

In an optical-fiber coupler formed by disposing two single-mode optical fibers 1 and 2 in parallel, and fusing and elongating the optical fibers at one position in the longitudinal extent of the optical fibers 1 and 2, variation of insertion loss dependent on the polarization can be eliminated in its manufacturing by imparting a twist to the optical coupling part 3' of the fused-elongated portion 3 so that with respect to the direction of a line on a plane orthogonally intersecting the longitudinal direction of the optical fibers 1 and 2, the line linking the centers of the two optical fibers 1 and 2, the direction of the line on a plane at one end of the optical coupling part 3' of the fused-elongated portion 3 makes an angle of 90 degrees with the direction of the line on a plane at the other end of the optical coupling part 3'.

Dans un optocoupleur formé en disposant deux fibres optiques monomodes 1 et 2 en parallèle, suivi du fusionnement et de l'étirage des fibres optiques dans l'axe longitudinal des fibres optiques 1 et 2, les variations de l'affaiblissement d'insertion résultant de la polarisation peuvent être éliminées en cours de fabrication par torsion de la partie 3 de la portion étirée et fusionnée de telle sorte que par rapport à la direction d'une ligne sur un plan orthogonal en intersection avec la direction longitudinale des fibres optiques 1 et 2 et la ligne joignant le centre des fibres optiques 1 et 2, la direction de la ligne sur un plan à une extrémité de la partie 3 de l'optocoupleur forme un angle de 90 degrés par rapport à la direction de la ligne sur un plan à l'autre extrémité de la partie 3 de l'optocoupleur.

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