US Patent 10488605 Photonic waveguide coupling using offset light source

A structure to couple light to a waveguide is described. In an example, a light source of the structure may emit light from an emission point towards a lens of the structure. The light source may be disposed at a location such that the emission point of the light source is offset from a center of the lens. The lens may be integrated in a substrate of a structure comprising the light source. The lens may refract the light emitted from the emission point at an angle. The angle may be based on the offset between the emission point and the center of the lens. The structure may couple the refracted light to a coupler of the waveguide at an incident angle.