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Optical transmission equipment and integrated circuit

  • US 20060269294A1
  • Filed: 02/15/2006
  • Published: 11/30/2006
  • Est. Priority Date: 05/31/2005
  • Status: Active Grant
First Claim
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1. Optical transmission equipment comprising:

  • an optical modulation unit including a plurality of optical modulators coupled to an internal optical transmission path; and

    an electric circuit unit for generating a plurality of high-speed serial digital signal streams to be supplied to said optical modulation unit, wherein said electric circuit unit includes;

    a plurality of parallel signal paths each for transferring an N-bit-parallel low-speed digital signal stream (N is an integer more than

         1);

    a plurality of multiplexing circuits each for converting the N-bit-parallel low-speed digital signal stream received from one of said parallel signal paths into a high-speed serial digital signal stream to be supplied to said optical modulation unit; and

    a delay control buffer circuit inserted in at least one of said parallel signal paths to receive the N-bit-parallel low-speed digital signal stream, wherein said delay control buffer circuit performs delay adjustment on the N-bit-parallel low-speed received digital signal stream, with the timing unit of a bit period of the high-speed serial digital signal stream or with a timing unit corresponding to an integral fraction of the bit period and outputs the resultant digital signal stream to the parallel signal path.

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