Optical fiber structure for efficient use of pump power

Details Optical fiber structure for efficient use of pump power Optical fiber structure for efficient use of pump power

H - Electricity

01

S

H01S 3/06 (2006.01) G02B 6/036 (2006.01) H01S 3/067 (2006.01) H01S 3/094 (2006.01)

Patent

CA 2196188

An optical fiber (130) structure for use in gain applications which comprises at least one core (134), selectively doped with an active gain species, and an inner cladding (132) surrounding the core, where the inner cladding serves the purpose of receiving multimode pump energy from an external power source, confining this energy, and transferring the energy into the core by means of repeated interactions between the energy and the active dopant within the core as the pump energy propagates along the length of the fiber structure. The cross-sectional shape of the inner cladding is in the form of a non- rectangular, convex polygon so that the propagating pump energy is induced to form an essentially uniform radiation field in which the various radiation modes comprising the pump energy are isotropically distributed.

Une structure de fibre optique (130) s'utilisant dans des applications de gain comprend au moins une âme(134), dopée sélectivement par une espèce de gain actif, et une gaine interne (132) entourant l'âme et qui sert à réceptionner une énergie de pompage multimode provenant d'une source de puissance extérieure, à confiner cette énergie et à la transférer dans l'âme au moyen d'interactions répétées entre l'énergie et le dopant actif se trouvant à l'intérieur de l'âme au moment où l'énergie de la pompe se propage sur la longueur de la structure fibreuse. La configuration transversale du gainage interne se présente sous la forme d'un polygone convexe, non rectangulaire de sorte que l'énergie qui se propage est induite sous forme d'un champ de rayonnement essentiellement uniforme dans lequel les divers modes de rayonnement renfermant l'énergie de la pompe sont répartis de manière isotropique.

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