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Evanescent waveguide couplers

  • US 7,333,690 B1
  • Filed: 03/24/2006
  • Issued: 02/19/2008
  • Est. Priority Date: 03/28/2005
  • Status: Expired due to Fees
First Claim
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1. A multi-port N-input, M-output, planar evanescent waveguide coupler, where M and N are each larger than two, the coupler including:

  • at least two planar evanescent waveguide coupler subunits having interaction lengths, andat least three waveguides optically connecting the coupler subunits,wherein the interaction lengths of the at least two planar evanescent waveguide coupler subunits are selected so that at least two of the M-outputs have maximum intensity locations separated by about one hundred twenty degrees as a function of the phase difference.

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