Optical fiber grating and manufacturing method therefor

Details Optical fiber grating and manufacturing method therefor Optical fiber grating and manufacturing method therefor

G - Physics

02

B

G02B 6/136 (2006.01) G02B 5/18 (2006.01) G02B 5/26 (2006.01) G02B 6/10 (2006.01) G02B 6/34 (2006.01) G02B 6/44 (2006.01) H04B 10/00 (2006.01)

Patent

CA 2239276

An optical fiber grating is manufactured by heating intermittently an optical fiber, provided with a core having residual stress in the longitudinal direction, softening a peripheral cladding of the core, and forming spatial periodical changes for the relative refractive index-difference between the core and the cladding, in the longitudinal direction of the aforementioned optical fiber by having the index of refraction of the core change, through the releasing of the aforementioned residual stress. As a result, an optical fiber grating and the manufacturing method thereof, which do not require expensive equipment and which exhibit high productivity, and furthermore a grating characteristic which is stable over time can be provided.

Réseau de fibres optiques fabriqué par le chauffage intermittent d'une fibre optique, munie d'une âme à contrainte résiduelle en direction longitudinale, le ramollissement d'une gaine périphérique de l'âme, et la formation de changements spatiaux périodiques pour tenir compte des différences relatives d'indice de réfraction entre l'âme et la gaine, en direction longitudinale de la fibre optique susmentionnée en faisant changer l'indice de réfraction de l'âme par la libération de la contrainte résiduelle susmentionnée. Il en résulte un réseau de fibres optiques et la méthode de fabrication connexe, qui ne nécessitent pas d'équipements dispendieux et qui donnent un niveau de productivité élevé, et de plus, donnent un réseau qui demeure stable à travers le temps.

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