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Photonic crystal waveguide and directional coupler using the same

  • US 6,631,236 B2
  • Filed: 03/29/2001
  • Issued: 10/07/2003
  • Est. Priority Date: 03/29/2000
  • Status: Active Grant
First Claim
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1. A photonic crystal waveguide comprising:

  • a substrate;

    a bottom cladding layer over said substrate; and

    a core layer over said bottom cladding layer, said core layer having a uniform distribution of holes;

    wherein said core layer has at least a waveguide region which is thicker than a remaining region of said core layer to cause a refractive index guide effect.

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