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:
Jan. 28, 2003
Filed:
Jun. 13, 2001
Applicant:
Inventors:
Ryuichi Sugizaki, Tokyo, JP;
Yoshihisa Suzuki, Tokyo, JP;
Assignee:
The Furukawa Electric Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/16 ;
U.S. Cl.
CPC ...
G02B 6/16 ;
Abstract
Disclosed is an optical fiber, which comprises a core and a clad of a two-layer structure including an innermost layer and an outermost layer, and has a refractive index distribution structure satisfying the conditions of 0.8% ≦&Dgr; ≦1.3 % and−0.7 % ≦&Dgr; −0.4%, and also satisfying the conditions of −20≦D≦0, −0.1≦S<0 and 0≦(D/S)≦200 in a specified wavelength band having a band width of at least 20 nm in a 1.5 &mgr;m wavelength band.