A method for producing a fiberoptic waveguide with a phase...

G - Physics – 02 – F

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G02F 1/01 (2006.01) C03B 37/15 (2006.01) G02B 6/10 (2006.01) G02B 6/255 (2006.01) G02B 6/34 (2006.01)

Patent

CA 2326960

A method is described for producing a fiberoptic waveguide with a basic segment (11) and a phase shift segment (12), the basic segment (11) and phase shift segment (12) having fiber cores (K) of the same form and the fiber cores being aligned at a defined angle (.alpha.) to one another. In the method, use is made of an optical fiber (1) having a fiber core (K) of the abovenamed form, which fiber is twisted at least approximately by the abovenamed defined angle (.alpha.) and held fixed in this torsional position. Subsequently, a stress-relief zone (13) is heated inside the twisted fiber (1) until the torsion is released inside the stress-relief zone (13) and the basic segment (11) is produced on one side of the stress-relief zone (13) and the phase shift segment (12) is produced on the other side. In this case, the fixing of the torsional position is maintained until after solidification of the stress-relief zone (13).

Description d'une méthode de réalisation d'un guide d'ondes à fibres optiques au moyen d'un segment de base (11) et d'un segment de déphasage (12), le segment de base (11) et le segment de déphasage comportant des noyaux de fibre optique (K) de la même forme, les noyaux de fibre optique étant alignés à un angle défini (.alpha.) l'un par rapport à l'autre. Dans la méthode décrite, on utilise une fibre optique (1) ayant un noyau en fibre (K) de la forme susmentionnée, dont la fibre est mise en torsion à l'angle minimum susmentionné approximatif (.alpha.), et fixée à cette position de torsion. Par la suite, une zone de détente (13) est chauffée dans la fibre en torsion (1) jusqu'à ce que ladite torsion soit relâchée dans dite zone de détente (13) et qu'il en résulte en un segment de base (11) d'un côté de la zone de détente (13), et en un segment de déphasage (12) de l'autre côté. Dans le présent cas, la fixation de la position de torsion est maintenue jusqu'à la fin de la solidification de la zone de détente.

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