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Vertically-tapered optical waveguide and optical spot transformer formed therefrom

  • US 6,768,855 B1
  • Filed: 07/05/2001
  • Issued: 07/27/2004
  • Est. Priority Date: 07/05/2001
  • Status: Active Grant
First Claim
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1. An optical waveguide formed on a substrate and comprising a waveguide core sandwiched between an upper cladding layer and a lower cladding layer, with the lower cladding layer being patterned to form a mesa structure having a width that varies with distance along at least a portion of the length of the optical waveguide, and with the thickness of the waveguide core varying in proportion to the width of the mesa structure.

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