Multi-cladding fiber

Details Multi-cladding fiber Multi-cladding fiber

G - Physics

02

B

G02B 6/036 (2006.01)

Patent

CA 2712123

Multi-cladding optical fibers to be used in the context of fiber amplifiers and fiber lasers are described herein. Embodiments of optical fibers include a rare-earth doped core into which the signal field is to be amplified. The doped core is surrounded by multiple claddings that guide the pump field to be absorbed by the reactive core material. The first cladding has a depressed refractive index to improve high-order mode bending losses without incurring significant fundamental mode bending losses.

L'invention porte sur des fibres optiques à multiples gaines, destinées à être utilisées dans le contexte d'amplificateurs à fibre et de lasers à fibre. Des modes de réalisation de fibres optiques comprennent un cur dopé aux terres rares dans lequel le champ de signal doit être amplifié. Le cur dopé est entouré par de multiples gaines qui guident le champ de pompage devant être absorbé par le matériau de cur réactif. La première gaine a un indice de réfraction déprimé pour améliorer des pertes par courbure de mode d'ordre élevé, sans subir de pertes par courbure de mode fondamental significatives.

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