Integrated waveguide coupler

摘要

A waveguide coupler includes a first waveguide and a second waveguide. The waveguide coupler also includes a connecting waveguide disposed between the first waveguide and the second waveguide. The connecting waveguide includes a first material having a first index of refraction and a second material having a second index of refraction higher than the first index of refraction.

主权项

1. An integrated waveguide coupler comprising:
a first waveguide comprising a higher refractive index portion that defines a light transmitting direction, a lower refractive index portion being disposed adjacent to the higher refractive index portion in a direction that is transverse to the light transmitting direction; a second waveguide, comprising a III-V material and disposed near the first waveguide, the first waveguide and the second waveguide facing one another across a gap in the light transmitting direction, such that the first waveguide propagates light in the light transmitting direction, across the gap, toward the second waveguide; and a connecting waveguide disposed in the gap between the first waveguide and the second waveguide, wherein the connecting waveguide comprises a first material, having a first index of refraction disposed substantially adjacent to the lower refractive index portion, and a second material having a second index of refraction higher than the first index of refraction and disposed substantially between the first waveguide and the second waveguides in the light transmitting direction.