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:
Jun. 30, 2015
Filed:
Jul. 23, 2010
Applicants:
Antonio Adigrat, Milan, IT;
Franco Cocchini, Milan, IT;
Antonio Collaro, Milan, IT;
Antonello Schiaffo, Milan, IT;
Inventors:
Antonio Adigrat, Milan, IT;
Franco Cocchini, Milan, IT;
Antonio Collaro, Milan, IT;
Antonello Schiaffo, Milan, IT;
Assignee:
PRYSMIAN S.P.A., Milan, IT;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 6/02 (2006.01); G02B 6/036 (2006.01);
U.S. Cl.
CPC ...
G02B 6/02 (2013.01); G02B 6/023 (2013.01); G02B 6/02333 (2013.01); G02B 6/02357 (2013.01); G02B 6/0365 (2013.01);
Abstract
A single-mode optical fiber for transmitting optical signals includes a central core region for guiding the optical signals, and a cladding region surrounding the core region and including a void-containing annular layer containing randomly distributed voids, wherein the void-containing layer is doped with fluorine at a concentration of less than 1 wt % and has a radial thickness equal to or smaller than 3 μm.