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Coherent optical detector having a multifunctional waveguide grating

  • US 8,588,565 B2
  • Filed: 03/20/2009
  • Issued: 11/19/2013
  • Est. Priority Date: 03/20/2009
  • Status: Active Grant
First Claim
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1. An apparatus, comprising:

  • a first waveguide grating;

    a first plurality of waveguides connected to the first waveguide grating, wherein;

    the first plurality comprises a first waveguide and a second waveguide collinear with the first waveguide at the first waveguide grating; and

    the first waveguide grating is configured to split optical power of a first polarization of a first optical signal applied to the first waveguide grating and couple the optical power of the first polarization of the first optical signal into the first and second waveguides; and

    a first optical coupler, wherein;

    the first and second waveguides are connected to a first side of the first optical coupler;

    the first waveguide has a first length between the first waveguide grating and the first optical coupler; and

    the second waveguide has a second length between the first waveguide grating and the first optical coupler, the second length being different from the first length.

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