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OPTICAL ORTHOGONAL FREQUENCY DIVISION MULTIPLEXED COMMUNICATIONS WITH COHERENT DETECTION

  • US 20080159758A1
  • Filed: 03/11/2008
  • Published: 07/03/2008
  • Est. Priority Date: 09/22/2003
  • Status: Active Grant
First Claim
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1. An optical receiver, comprising:

  • a polarization beam splitter for receiving an optical beam with data and splitting it into a first and a second beam;

    a first optical hybrid for receiving the first beam and a first local oscillator beam;

    a first set of photodetectors receiving output beams from the first optical hybrid and producing electrical signals;

    a digital signal processing unit receiving the electrical signals, converting them into digital signals, transforming the digital signals into frequency domain, forming a set of spectral signals each having its own digital frequency, recovering the polarization state of each spectral signal, demodulating the data encoded in each spectral signal, and outputting an information encoded in the optical beam with data.

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