Optical fiber, light-emitting module, and optical fiber...

Details Optical fiber, light-emitting module, and optical fiber... Optical fiber, light-emitting module, and optical fiber...

G - Physics

02

B

G02B 6/02 (2006.01) G02B 6/036 (2006.01) G02B 6/28 (2006.01) G02B 6/42 (2006.01) H01S 3/06 (2006.01) H01S 3/094 (2006.01) H01S 3/0941 (2006.01) H04B 10/16 (2006.01) H01S 3/067 (2006.01)

Patent

CA 2329743

An optical fiber amplifier comprising an amplifying optical fiber (60) for amplifying a signal light by using inputted pumping light, a semiconductor light-emitting device (10) for outputting the pumping light, a focusing optical system (30) for focusing the pumping light, and light-guide optical fibers (20 to 22) for guiding light to the amplifying optical fiber through a core region, wherein the optical fibers (20 to 22) are so arranged that the direction in which the width of the core region at the light input face is maximum is the one in which the width of the inputted beam is maximum, and the maximum width D[µm] of the core region at the light input face satisfies the inequalities: L sin .THETA./NA<=5 D<=L, where NA is the numerical aperture, L[µm] is the maximum width of the light-emitting region of the light-emitting device (10), and .THETA. is the divergence angle of the outputted beam in the direction of the maximum width of the light-emitting region.

L'invention concerne un amplificateur à fibre optique comprenant une fibre (60) optique amplificatrice servant à amplifier une lumière de signal en utilisant la lumière de pompage entrante, un dispositif (10) lumineux à semi-conducteur permettant d'émettre la lumière de pompage, un système (30) optique de focalisation permettant de focaliser la lumière, et des fibres (20 à 22) optiques guides d'ondes guidant la lumière vers la fibre optique amplificatrice à travers une région âme. Les fibres (20 à 22) optiques sont disposées de telle manière que la direction dans laquelle la largeur de la région coeur du côté entrée de lumière est la plus importante correspond à la direction dans laquelle la largeur du faisceau introduit est maximale, et la largeur maximale D [ mu m] de la région coeur sur la face d'entrée de lumière répond aux inégalités suivantes: L sin theta /NA </= D </= L, NA étant l'ouverture numérique, L [ mu m] la largeur maximale de la région émettrice de lumière du dispositif (10) lumineux, et theta l'angle de divergence du faisceau émis dans la direction de la largeur maximale de la région émettrice de lumière.

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