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. 08, 2016
Filed:
Dec. 23, 2010
Silvio Frigerio, Milan, IT;
Ricardo Antunes DE Camargo, Milan, IT;
Lidia Terruzzi, Milan, IT;
PRYSMIAN S.P.A., Milan, IT;
Abstract
A single-mode transmission optical fiber includes a central core region radially outwardly from a centerline to a radius rand having a positive relative refractive index Δ; a first inner cladding region extending radially outwardly from the central core to a radius rand having a negative relative refractive index Δ; a second inner cladding region extending radially outwardly from the first inner cladding region to a radius rand having a non-negative relative refractive index Δ; an intermediate cladding region extending radially outwardly from the second inner cladding region to a radius rhaving a negative relative refractive index Δlarger in absolute value than the relative refractive index Δ; and an outer cladding region extending radially outwardly from the intermediate cladding region and having a non-negative relative refractive index Δ; wherein the relative refractive index Δof the first inner cladding region is −0.1·10to −1.0·10and the relative refractive index Δof the intermediate cladding is −3.0·10to −5.0·10.