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Y branching optical waveguide and optical integrated circuit

  • US 6,236,784 B1
  • Filed: 02/26/1999
  • Issued: 05/22/2001
  • Est. Priority Date: 08/10/1998
  • Status: Expired due to Term
First Claim
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1. A Y branch optical waveguide, comprising:

  • a first optical waveguide;

    two second optical waveguides; and

    a multi-mode optical waveguide connected between said first optical waveguide and said two second optical waveguides;

    wherein the width of said first optical waveguide and the width of said multi-mode optical waveguide are different in a direction orthogonal to an extension of an optical axis at a portion where said first optical waveguide and said multi-mode optical waveguide are connected to each other, and said multi-mode optical waveguide has shapes asymmetric with respect to an extension of a center line, extending in the direction of the optical axis, of said first optical waveguide so that propagation light has an asymmetric optical intensity distribution at a portion where said multi-mode optical waveguide and second optical waveguides are connected when light is incident from said first optical waveguide, and said optical intensity distribution has a first peak and a second peak different in light intensity from each other and each of said peaks is located at near a center of each of said second optical waveguides at portions where said multi-mode optical waveguide and said second optical waveguides are connected, respectively.

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