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:
Feb. 07, 2006
Filed:
Jan. 21, 2003
Gregory L. Keaton, San Francisco, CA (US);
Mark A. Arbore, Los Altos, CA (US);
Thomas J. Kane, Menlo Park, CA (US);
Gregory L. Keaton, San Francisco, CA (US);
Mark A. Arbore, Los Altos, CA (US);
Thomas J. Kane, Menlo Park, CA (US);
JDS Uniphase Corporation, San Jose, CA (US);
Abstract
A method of producing a short-pass fiber by drawing a preform for a depressed cladding fiber at a predetermined drawing ratio. The preform has a core of refractive index n, a depressed cladding surrounding the core and having a refractive index n, and a secondary cladding surrounding the depressed cladding and having a refractive index n. The core has a core cross-section and the depressed cladding has a depressed cladding cross-section that is larger than the core cross-section. The drawing ratio is determined based on the parameters of the preform measured along the axis of the preform and based on a desired minimum fundamental mode cutoff wavelength λ. The final core cross-section defines a fundamental mode cutoff wavelength λsuch that λ≧λalong the axis. Then the preform is pulled by the thus-determined drawing ratio to produce the short-pass fiber. In some embodiments a test section of the fiber is pulled first before pulling the short pass fiber.