CPC G02B 6/1228 (2013.01) [G02B 6/136 (2013.01); G02B 6/14 (2013.01); G02B 6/305 (2013.01); G02B 2006/12121 (2013.01); G02B 2006/12123 (2013.01); G02B 2006/12152 (2013.01)] | 20 Claims |
1. A structure comprising:
a first waveguide core including a section having a first trapezoidal portion and a second trapezoidal portion stacked with the first trapezoidal portion, the first trapezoidal portion having a first trapezoidal shape, and the second trapezoidal portion having a second trapezoidal shape different from the first trapezoidal shape,
wherein the section of the first waveguide core is tapered, the section of the first waveguide core terminates at an end, and the first trapezoidal shape and the second trapezoidal shape extend to the end of the section of the first waveguide core.
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