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:
Apr. 29, 2008
Filed:
Feb. 22, 2005
John Roberts, Combe Down, GB;
Hendrik Sabert, Stelle, DE;
Brian Joseph Mangan, Bath, GB;
Lance Farr, Hereford, GB;
John Roberts, Combe Down, GB;
Hendrik Sabert, Stelle, DE;
Brian Joseph Mangan, Bath, GB;
Lance Farr, Hereford, GB;
Crystal Fibre A/S, Birkerod, DK;
Abstract
An optical fiber having a cladding region surrounding a core region having an elongate core hole, the inner or outer surface of the core hole having a surface roughness with a spatial period equal to or less than 5 μm by a spectral power below 0.0017 nmμm. A method of making an optical fiber including a cladding region having an arrangement of elongate cladding holes in a matrix material, surrounding an elongate core region having an elongate core hole, the method including the step of increasing the surface tension of the matrix material prior to or during the step of heating and drawing the fiber.