Transponder and wavelength division-multiplexing optical transmission equipment

A wavelength converter comprising:

• an optical/electrical signal converter that converts input optical signals into electrical digital signals;
• a phase-synchronized oscillator circuit for generating clock signals each having an output clock frequency according to a transmission mode, said phase-synchronized oscillator being phase-controlled according to said electrical digital signals.
• a timing regeneration circuit connected to said phase-synchronized oscillator for regenerating a clock timing signal for said electrical digital signals based upon the clock signals that are generated from said phase-synchronized oscillator circuit;
• an electric/optical converter connected to said timing regeneration circuit converting the electrical digital signals that are outputted from said timing regeneration circuit into optical signals of a specified wavelength;
• and
• an auto-clock controller connected to said phase-synchronized oscillator circuit for controlling the clock signal of said phase-synchronized oscillator circuit based upon a comparison between a reference clock corresponding to a signal transmission mode of the electrical digital signals and the clock signals.

An optical communication apparatus comprising:

• a first clock generation circuit for automatically identifying a transmission mode for transmission digital signals and for generating phase-synchronized clock signals with a specified frequency that matches the signal transmission mode;
• a first timing regeneration circuit connected to said first clock generation circuit for regenerating clock timing for the transmission digital signals based upon the phase-synchronized clock signals from said first clock generation circuit;
• a first electric/optical converter connected to said first timing regeneration circuit for converting the transmission digital signals from said first timing regeneration circuit into first optical signals at a specified wavelength, said first electric/optical converter transmitting the optical signals to an optical network node;
• a first optical/electrical converter connected to the optical network node for converting the optical signals at a specified wavelength that are received from an optical network node into electrical, received digital signals;
• a second clock generation circuit connected to said first optical/electrical converter for automatically identifying the transmission mode for the electrical digital signals from said optical/electrical signal converter and for generating phase-synchronized clock signal at a specified frequency that matches the signal transmission mode of the electrical digital signals;
• and
• a second timing regeneration circuit connected to said second clock generation circuit for regenerating the clock timing for the electrical received digital signals based upon the phase-synchronized clock signals from said second clock generation circuit.

A wavelength division-multiplexing optical communication apparatus comprising:

• a clock generation circuit for automatically identifying a signal transmission mode for transmission digital signals and for generating phase-synchronized clock signals with a specified frequency that matches the signal transmission mode;
• a timing regeneration circuit for regenerating clock timing of the transmission digital signals based upon the phase-synchronized clock signals from said clock generation circuit;
• an electric/optical converter connected to said timing regeneration circuit for converting the transmission digital signals from said timing regeneration circuit into optical signals at a specified wavelength;
• and
• a wavelength division-multiplexing optical transmission equipment connected to said electric/optical converter for wavelength-multiplexing the optical signals from said electric/optical converter with optical signals at other wavelengths and for transmitting the optical signals to an optical network.

A wavelength division-multiplexing optical communication apparatus comprising:

• a wavelength separator for separating first optical signals of a specified wavelength from wavelength-multiplexed optical signals that are received from an optical network;
• an optical/electrical signal converter connected to said wavelength separator for converting the first optical signals of a specified wavelength received from said wavelength separator into electrical digital signals;
• a clock generator circuit connected to said optical/electrical signal convertor automatically identifying a signal transmission mode for the electrical digital signals from said optical/electrical signal converter and for generating phase-synchronized clock signals of a specified wavelength that matches the signal transmission mode;
• a timing regeneration circuit connected to said clock generator circuit for regenerating clock timing for said electrical digital signals based upon the phase-synchronized clock signals from said clock generator circuit;
• and
• an electric/optical converter connected to said timing regeneration circuit for converting the electrical digital signals from said timing regeneration circuit into second optical signals of a specified wavelength.