Method of forming optical fibre gratings

Details Method of forming optical fibre gratings Method of forming optical fibre gratings

G - Physics

02

B

G02B 5/18 (2006.01) G02B 6/10 (2006.01) G02B 6/34 (2006.01)

Patent

CA 2093642

An optical fibre (2) is fixed between a clamp (6) and a piezo-electric translation stage (10). An argon ion laser (12) emitting at 514.5 nm is used to write Bragg gratings in the fibre (2). A different longitudinal stress is applied to the fibre (2) before optical-writing each Bragg grating. The fibre (2) when unstressed will have a Bragg grating of different peak reflectivity corresponding to the number of different applied stresses.

Une fibre optique (2) est fixée entre un élément de serrage (6) et un étage de translation piézo-électrique (10). Un laser à ions d'argon (12) émettant à 514,5 nm est utilisé pour inscrire des réseaux de Bragg dans la fibre (2). Une différente contrainte longitudinale est appliquée à la fibre (2) avant d'inscrire optiquement chaque réseau de Bragg. La fibre (2), lorsque la contrainte n'est plus appliquée, présentera un réseau de Bragg d'un pouvvoir réfléchissant de crête différent correspondant au nombre de contraintes différentes qui ont été appliquées.

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