Mode size converters for reducing a modal profile of incoming light
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United States of America Patent
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May 24, 2016
Grant Date -
May 12, 2016
app pub date -
Nov 10, 2014
filing date -
Nov 10, 2014
priority date (Note) -
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Abstract
Mode size converter including an overlay waveguide having an input end configured to receive light from an optical element. The overlay waveguide has a first refractive index. The mode size converter also includes a signal waveguide that is embedded within the overlay waveguide and has a second refractive index that is greater than the first refractive index. The signal waveguide includes first and second arm segments and a stem segment that form a Y-junction. The first and second arm segments are configured to reduce a modal profile of the light propagating toward the stem segment from the input end of the overlay waveguide. Each of the first and second arm segments has a distal end and a pair of opposite side edges, wherein the pair of side edges extend parallel to each other between the corresponding distal end and the stem segment.
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