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. 22, 2011
Filed:
Jun. 29, 2009
Ivo Flammer, Paris, FR;
Louis-anne DE Montmorillon, Versailles, FR;
Pieter Matthijsse, Hapert, NL;
Draka Comteq B.V., Amsterdam, NL;
Abstract
An improved optical fiber achieves both reduced bending and microbending losses, as well as a much higher Brillouin threshold, as compared to standard transmission fibers. The optical fiber comprises a core including at least two dopants and having a refractive index difference Δnwith an outer optical cladding, a first inner cladding having a refractive index difference Δnwith the outer cladding, and a depressed, second inner cladding having a refractive index difference Δnwith the outer cladding of less than −3×10. The radial concentration of at least one of the core dopants varies continuously over the entire core region of the optical fiber.