Title:
OPTICAL TRANSMISSION SYSTEM EMPLOYING ERBIUM-DOPED OPTICAL AMPLIFIERS AND RAMAN AMPLIFIERS
Document Type and Number:
WIPO Patent Application WO2004019075
Kind Code:
A3
Abstract:
In an optical communication system that includes a transmitting terminal, a receiving terminal, and an optical transmission path optically coupling the transmitting and receiving terminals and having at least one rare-earth doped optical amplifier therein, a second optical amplifier is provided The second optical amplifier includes a first portion of the optical transmission path having a first end coupled to the transmitting terminal and a second end coupled to a first of the rare-earth doped optical amplifiers. In addition, the second optical amplifier includes a pump source providing pump energy to the first portion of the optical transmission path at one or more wavelengths that is less than a signal wavelength to provide Raman gain in the first portion at the signal wavelength.
Inventors:
EVANGELIDES STEPHEN G JR
NAGEL JONATHAN A
YOUNG MARK K
NAGEL JONATHAN A
YOUNG MARK K
Application Number:
PCT/US2003/026107
Publication Date:
August 19, 2004
Filing Date:
August 20, 2003
Export Citation:
Assignee:
RED SKY SYSTEMS INC (US)
International Classes:
H04B10/17; (IPC1-7): H04B10/12
Foreign References:
| US20030030891A1 | 2003-02-13 | |||
| US6633712B2 | 2003-10-14 | |||
| US6141468A | 2000-10-31 | |||
| US20030077032A1 | 2003-04-24 |
Other References:
AGRAWAL G.P.: "Fiber-Optic Communication Systems, 3rd Edition", 28 May 2002, JOHN WILEY AND SONS, INC.I, pages: 229
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