Patent ID: 9348092
Filing Date: 2016-05-24
CPC Classification: G02B

Claim Text:
1. A mode size converter comprising: an overlay waveguide having an input end configured to receive light from an optical element, the overlay waveguide having a first refractive index; and a signal waveguide embedded within the overlay waveguide and having a second refractive index that is greater than the first refractive index, the signal waveguide including first and second arm segments and a stem segment that form a Y-junction, the first and second arm segments configured to reduce a modal profile of the light propagating from the input end of the overlay waveguide toward the stem segment, each of the first and second arm segments having 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.