Patent ID: 7190510
Filing Date: 2007-03-13
Classification: H01S,H04B

Abstract:
1. A metro wavelength division multiplexing network comprising: a plurality of optical repeaters coupled to each other through an optical fiber link, wherein gain center wavelengths between optical repeaters are different from one another and includes: a Raman gain medium disposed in each of the optical repeater for Raman-amplifying inputted optical signals; an amplification medium having a center wavelength different from a gain center wavelength of the Raman gain medium and amplifying a Raman-amplified optical signals, wherein the amplification medium includes a gain clamped semiconductor optical amplifier; and a pumping unit for pumping the Raman gain medium, wherein the Raman gain medium and amplification medium are configured so wavelength band of optical signals amplified by the Raman gain medium and the amplification medium overlap with each other.