Patent ID: 6449069
Filing Date: 2002-09-10
Classification: H04J,H04Q

Abstract:
Optical transmission equipment, comprising:a multiplexing unit that multiplexes a plurality of optical signals having multiple wavelengths and; a demultiplexing unit that demultiplexes a multiplexed optical signal; wherein said multiplexing unit comprises: an optical multiplexing conversion unit having a plurality of optical/electrical conversion units which convert a portion of said plurality of optical signals to a plurality of electrical signals; a time-division multiplexing unit which time-division multiplexes said plurality of electrical signals from said optical/electrical conversion units to a first high-speed electrical signal; an electrical/optical conversion unit which converts said first high speed electrical signal to a first high speed optical signal, said optical transmission equipment further comprises: a wavelength multiplexing unit which wavelengths-multiplexes optical signals including a remaining portion of said plurality of optical signals with a plurality of different wavelengths, and said first high-speed optical signal; and wherein said demultiplexing unit comprises: a wavelength demultiplexing unit which wavelength demultiplexes a wavelength-multiplexed optical signal to a plurality of optical signals with a plurality of different wavelengths, said plurality of optical signals including said first high speed optical signal and a remaining portion of wavelength demultiplexed optical signals; at least one optical/electrical conversion unit which converts said first high-speed optical signal to said high-speed electrical signal; a time-division demultiplexing unit which demultiplexes said first high-speed electrical signal to a plurality of electrical signals; a plurality of electrical/optical conversion units which convert said plurality of electrical signals to optical signals having different wavelengths; and a plurality of optical/electrical/optical conversion units which convert said remaining portion of wavelength demultiplexed optical signals to a plurality of optical signals each having different wavelengths.