CPC G02B 6/1228 (2013.01) [G02B 6/13 (2013.01); G02B 2006/12061 (2013.01)] | 20 Claims |
1. A structure for an edge coupler, the structure comprising:
a first waveguide core including a first inverse taper;
a second waveguide core including a second inverse taper;
a third waveguide core including a third inverse taper laterally positioned between the first inverse taper and the second inverse taper;
a fourth waveguide core including a fourth inverse taper positioned to overlap with the first inverse taper; and
a fifth waveguide core including a fifth inverse taper positioned to overlap with the second inverse taper,
wherein the first waveguide core, the second waveguide core, and the third waveguide core comprise single-crystal silicon, and the fourth waveguide core and the fifth waveguide core comprise silicon nitride.
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