H - Electricity – 01 – S
Patent
H - Electricity
01
S
H01S 3/067 (2006.01) C03B 37/012 (2006.01)
Patent
CA 2330281
The present invention relates to a light-amplifying optical fiber comprising a structure for realizing a flat gain characteristic or oscillation characteristic in a wider wavelength band, and a method of making the same. The light-amplifying optical fiber according to the present invention comprises a second doped area containing a first doped area including an optical axis center and having a larger outer diameter than the first doped area. The second doped area is doped with at least one of A12O3, P2O5, Y2O3, and B2O3 as an oxide of an element having a valence different from that of a cation constituting a main material of the light-amplifying optical fiber; whereas the first doped area is doped with at least one of Er, Nd, Tm, Yb, and Pr as a rare-earth element together with the oxide.
La présente invention concerne un fibre optique d'amplification, muni d'une structure permettant des caractéristiques de gain uniforme ou des caractéristiques d'oscillation dans des bandes de longueur d'onde plus larges. Le fibre optique d'amplification est muni d'une deuxième région dopée comprenant une première région dopée incluant un centre d'axe optique et présentant un diamètre supérieure à celui de la première région dopée. Le procédé de fabrication consiste en l'ajout d'au moins un parmi Al2O3, P2O5, Y2O3 et B2O3 dans la deuxième région dopée en tant qu'oxydes d'éléments à valences différentes de celles des cations constituant les principaux matériaux dudit fibre optique. On ajoute, un parmi Er, Nd, Tm, Pr en tant qu'éléments de terre rare en sus desdits oxydes dans la première région dopée.
Endo Shinji
Ishikawa Shinji
Kakui Motoki
Suzuki Toshimi
Marks & Clerk
Sumitomo Electric Industries Ltd.
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