Patent ID: 7536110
Filing Date: 2009-05-19
Classification: H04B,H04J

Abstract:
1. An optical transmission device for transmitting a wavelength division multiplexed optical signal from a first optical transmission path to a second optical transmission path after amplification, comprising: a wavelength-division demultiplexer connected to the first optical transmission path for demultiplexing the wavelength division multiplexed optical signals into first wavelength division multiplexed optical signals and second wavelength division multiplexed optical signals; a first optical amplifier connected to said wavelength-division demultiplexer for amplifying the first wavelength division multiplexed optical signals to generate first amplified wavelength division multiplexed optical signals having a first optical strength signal as designated as P a second optical amplifier connected to said wavelength-division demultiplexer for amplifying the second wave division multiplexed optical signals to generate second amplified wavelength division multiplexed optical signals having a second optical strength signal as designated as P a wavelength-division multiplexer connected to said first optical amplifier and said second optical amplifier for multiplexing the first amplified wavelength division multiplexed optical signals and the second amplified wavelength division multiplexed optical signals; and a controller for receiving a third optical strength signal as designated as P