Fatimah M Shehadeh

US Patent:

6980740, Dec 27, 2005

Filed:

Jun 22, 2000

Appl. No.:

09/599194

Inventors:

Nathan M. Denkin - Matawan NJ, US
Wenhua Lin - Middletown NJ, US
Fatimah Shehadeh - Ocean NJ, US

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04B017/00

US Classification:

398 38, 398197, 398177, 398181, 398175, 398 33, 398 94

Abstract:

A unique sensor is used to detect a transmission impairment that may have affected incoming optical channel signals. The sensor, more specifically, selects a group of the incoming channel signals and generates a first power signal, P, over the selected group of signals and generates a second power signals, P, over a weighted version of the selected group of channel signals. The sensor then generates, as a function of the first and second power signals, Pand P, a signal indicative of whether the particular transmission impairment affected the levels of individual ones of the incoming channel signals. If so, then control apparatus offsets the impairment accordingly.

US Patent:

60881526, Jul 11, 2000

Filed:

Mar 8, 1999

Appl. No.:

9/265943

Inventors:

Matthias Berger - Tinton Falls NJ
Dirk Bode - Tinton Falls NJ
Daniel A. Fishman - Lakewood NJ
Gabriela Livescu - Marlboro NJ
Christian Raabe - Tinton Falls NJ
Fatimah Shehadeh - Ocean NJ
Jianhui Zhou - Freehold NJ
Martin Zirngibl - Middletown NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H01S 310
H01S 3108
H01S 330

US Classification:

359334

Abstract:

An optical amplifier is adapted to cancel the Raman gain of an optical transmission path that degrades those optical signals occupying the low end of the bandwidth such that the power is transferred from the latter signals to the optical signals occupying the high end of the bandwidth. More specifically, the optical amplifier adjusts the gain that it applies to the optical signals so that it favors the signal components at the low end of the bandwidth.