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:
Apr. 02, 2002
Filed:
Jun. 16, 2000
Applicant:
Inventors:
Eric Brandon, Bourg la Reine, FR;
Jean-Pierre Blondel, Buc, FR;
Patrice Le Roux, Montlhery, FR;
Denis Toullier, Fleury les Aubrais, FR;
Assignee:
Alcatel, Paris, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 6/02 ;
U.S. Cl.
CPC ...
G02B 6/02 ;
Abstract
In a fiber optic transmission system comprising line fiber and a pump for distributed amplification in the line fiber by stimulated Raman scattering, the line fiber comprises multiple sections and the nature of the fibers in each section and the length of each section are chosen so that the Raman gain is lower than the Rayleigh backscattering coefficient at all points of the system. This avoids the limitations that are experienced if the Raman gain is greater than the Rayleigh backscattering coefficient.