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:
Mar. 18, 2003
Filed:
Aug. 09, 2000
Arthur F Judy, Atlanta, GA (US);
Lucent Technologies Inc., Murray Hill, NJ (US);
Abstract
A Raman-amplified optical transmission system includes a source of optical transmission signals having a system wavelength, &lgr; , that are connected to one end of the of a first optical fiber - having a large effective area, i.e., A ≧70 &mgr;m . The other end of the first optical fiber is connected to a second optical fiber - having a small effective area, i.e., A ≦60 &mgr;m . Preferably, the first and second optical fibers have opposite dispersion signs. A wavelength-division multiplexer for example, couples optical transmission signals &lgr; . . . &lgr; , from an optical pump to the second optical fiber that cause it to exhibit stimulated Raman scattering, which provides amplification of the optical transmission signals. Preferably, the optical pump signals propagate along the second optical fiber in a direction that is opposite the direction of the optical transmission signals. Exemplary cables are disclosed that include both large and small-effective-area fibers. One cable is defined by a planar array of optical fibers that are bound together by a matrix material in what is referred to as a ribbon, and another cable is defined by fibers that are enclosed within one or more plastic tubes