Free-space optical hybrid

  • US 20070223932A1
  • Filed: 03/27/2007
  • Published: 09/27/2007
  • Est. Priority Date: 03/27/2006
  • Status: Active Grant
First Claim
Patent Images

1. An optical hybrid, comprising:

  • means for splitting a signal light beam (S) into a reflected signal light beam (RS) and a transmitted signal light beam (TS);

    means for splitting a reference light beam (L) into a reflected light beam (RL) and a transmitted light beam (TL); and

    means for combining pairs of said RS TS, RL and TL to produce a plurality of combined output beams comprising an S+L beam, an S+jL beam, an S−

    L beam and an S−

    jL beam, wherein the phase difference, between said S light beam and said L light beam in said S+jL beam, said S−

    L beam and said S−

    jL beam, with respect to the phase difference between said S light beam and said L light beam in said S+L beam, is about 90 degrees, 180 degrees and 270 degrees respectively.

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