The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 06, 2001
Filed:
Nov. 18, 1997
Applicant:
Inventors:
Yoshinori Kubota, Yamaguchi, JP;
Natsuya Nishimura, Yamaguchi, JP;
Assignee:
Central Glass Company, Limited, Ube, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01S 3/067 ; G02B 6/16 ;
U.S. Cl.
CPC ...
H01S 3/067 ; G02B 6/16 ;
Abstract
The invention relates to an optical waveguide having a core made of one member selected from halide glasses, chalcogenide glasses and oxyhalide glasses. This one member is doped with both of erbium and cerium. The invention further relates to a 1.5 &mgr;m-band optical amplifier having the optical waveguide for amplifying the light. Due to the doping of both erbium and cerium, it becomes possible to provide a highly efficient optical amplifier having low noise and wide band. With this, it becomes possible to construct an optical communication network having high credibility, high capacity and high speed.