Optical fiber with tin doped core-cladding interface

Details Optical fiber with tin doped core-cladding interface Optical fiber with tin doped core-cladding interface

C - Chemistry, Metallurgy

03

C

C03C 13/04 (2006.01) G02B 6/036 (2006.01)

Patent

CA 2687969

The present invention concerns an optical fiber 10 comprising a substantially pure silica glass core 12, a concentric tin-doped core/cladding interface region 14, and a concentric fluorine-doped depressed cladding layer 16. The tin-doped core/cladding interface region 14 comprises a low concentration gradient of tin dioxide, which advantageously results in a de minimis refractive index change, resistance to hydrogen incursion, and thermal stability of any fiber Bragg gratings written into the interface region 14.

Cette invention concerne une fibre optique (10) constituée d'une âme en verre de silice sensiblement pure (12), d'une région d'interface âme-gainage concentrique dopée à l'étain (14) et d'une couche de gainage à indice déprimé (16). La région d'interface âme-gainage dopée à l'étain (14) contient un gradient de dioxyde d'étain offrant l'avantage de procurer un changement de minimis de l'indice de réfraction, une résistance à l'incursion d'hydrogène et une stabilité thermique de tout réseau de Bragg à fibres inscrit dans la région d'interface (14).

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