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:
Jul. 19, 2005
Filed:
Jun. 27, 2001
Andrea Galtarossa, Padua, IT;
Anna Pizzinat, Conegliano, IT;
Luca Palmieri, Padua, IT;
Pirelli Cavi e Sistemi S.p.A., Milan, IT;
Abstract
A method for determining at least one parameter of a periodic spin function α(z) with period p, to be applied to an optical fiber along its length z during a drawing process. At least one parameter is selected so that (I) where εis about 0.05 and yis the first of the three components y(z), y(z), y(z) of a periodic function y(z) of period p such that (II) where Lis an expected beat length of said optical fiber and α(z) is the derivative of the spin function α(z) with respect to the length z. The method is effective for substantially reducing the PMD of optical fibers drawn when applying a spin function.