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Waveguide Retroreflector And Method Of Fabricating The Same

  • US 20090180511A1
  • Filed: 01/16/2008
  • Published: 07/16/2009
  • Est. Priority Date: 01/16/2008
  • Status: Active Grant
First Claim
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1. A waveguide retroreflector, comprising:

  • an optical waveguide having an end face;

    an optical element bonded to said optical waveguide end face,wherein the optical element is substantially free of voids and/or air spaces in a light transmitting region thereof, wherein said light transmitting region of the optical element has a length along a direction of light propagation in said region;

    wherein the optical element has a convex end face having a radius of curvature at an end of the light transmitting region;

    wherein said radius of curvature is between 80% and 120% of the length of the light transmitting region of the optical element, such that at least 5% of a light reflected from said convex end face is coupled back into the optical waveguide.

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