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:
Aug. 25, 1998
Filed:
Oct. 16, 1996
Applicant:
Inventors:
Akira Oyobe, Yokohama, JP;
Atsushi Umeda, Ichihara, JP;
Assignee:
The Furukawa Electric Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
385124 ; 65385 ; 65397 ;
Abstract
There is provided a dispersion compensating fiber comprising a center core in which a first dopant is doped substantially uniformly, an outer core provided at the outer periphery of the center core, in which the first dopant is doped so as to decrease gradually toward the outer periphery, and a clad provided at the outer periphery of the outer core, in which a second dopant is doped. The second dopant of the outer core is doped so that the viscosity on at least the outer periphery side of the outer core is substantially equal to the viscosity of the clad.