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. 28, 2005
Filed:
Nov. 07, 2002
Pierre Sillard, Le Chesnay, FR;
Lionel Expert, Paris, FR;
Pascale Nouchi, Maisons-Lafitte, FR;
Alcatel, Paris, FR;
Abstract
The invention relates to a dispersion-compensating optical fiber for use in wavelength division multiplex transmission systems, said fiber including successively, from the center toward the periphery, a core having a varying index profile and then a cladding having a constant index, enabling the propagation, for a given operating spectral range greater than 30 nm, of at least one higher-order mode in addition to the LPfundamental mode, the index profile of the core being determined so that, for said higher mode, and for said operating spectral range, the chromatic dispersion is less than −150 ps/nm.km, the chromatic dispersion slope is negative, the effective area is greater than 40 μm, the difference between the wavelength corresponding to the overall minimum chromatic dispersion outside the operating spectral range and the wavelength corresponding to the upper limit of the operating spectral range is greater than 35 nm, and the relative variation of the dispersion slope over the operating spectral range has an absolute value less than 30%.