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. 26, 2012
Filed:
Mar. 18, 2011
David Mcdonald Stirling, Killara, AU;
Franklin W. Dabby, Los Angeles, CA (US);
Gordon Randall Gould, Oxnard, CA (US);
Henry Willner, Long Beach, CA (US);
David McDonald Stirling, Killara, AU;
Franklin W. Dabby, Los Angeles, CA (US);
Gordon Randall Gould, Oxnard, CA (US);
Henry Willner, Long Beach, CA (US);
ASI/Silica Machinery, LLC, North Hills, CA (US);
Abstract
A method of manufacturing a cylindrical glass optical waveguide preform having a low water content centerline region, for use in the manufacture of optical waveguide fiber, is disclosed. The centerline region of the glass optical waveguide preform has a water content sufficiently low such that an optical waveguide fiber producible from the glass optical waveguide preform of the present invention exhibits an optical attenuation of less than about 0.35 dB/km, and preferably less than about 0.31 dB/km, at a measured wavelength of 1380 nm. Method of manufacture of a porous core mandrel used in the manufacture of such a glass optical waveguide preform is also disclosed.