Patent ID: 7020401
Filing Date: 2006-03-28
Classification: H03L,H04B,H04J,H04L

Abstract:
1. A wavelength converter comprising: an optical/electrical signal converter for converting an input optical signal into an electrical digital signal; a clock generation unit connected to said optical/electrical signal converter and receiving reference clock signals each having a predetermined frequency indicating a transmission mode for automatically identifying one of at least two predetermined signal transmission modes for the electrical digital signal and generating a phase-synchronized clock signal with the corresponding frequency that matches the identified signal transmission mode based upon one of the reference clock signals; a timing regeneration circuit connected to said clock generation unit for regenerating a clock timing for the electrical digital signal based upon the phase-synchronized clock signal that is generated from said clock generation unit; an electrical/optical converter connected to said timing regeneration circuit for converting the electrical digital signal that is outputted from said timing regeneration circuit into an optical signal with a specified wavelength for wavelength-division multiplexed transmission; and a controller connected to said clock generation unit for controlling said clock generation unit for selecting the one the reference clock signals that corresponds to the identified signal transmission mode.