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ENHANCED COUPLING STRENGTH GRATINGS

  • US 20150063753A1
  • Filed: 09/05/2014
  • Published: 03/05/2015
  • Est. Priority Date: 09/05/2013
  • Status: Active Grant
First Claim
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1. An enhanced coupling strength grating, comprising:

  • a substrate (12);

    a core (14) disposed on the substrate (12);

    one or more ridges (16) and one or more grooves (17) formed on the core (14), wherein the one or more grooves (17) are adjacent to, or between the one or more ridges (16), wherein the ridges (16) and grooves (17) form a grating (19);

    a liner layer (18) disposed on at least a portion of a grating cycle; and

    a cover layer (20) disposed on the liner layer (18), wherein a first material selected for the core (14) and ridges (16) and a second material selected for the liner layer (18) are selected to provide a difference in the index of refraction between the first and second material that is sufficient to provide a contrast therebetween.

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