Hybrid Si/III-V lasers with adiabatic coupling

We report on hybrid Si/III­V lasers with adiabatic coupling. The proposed architectures, based on adiabatic mode transformers, allow laser mode to experience maximal gain available in the III-V region while maintaining a high coupling efficiency (>95%) to Si-waveguides. Hybrid Fabry-Pérot and racetrack lasers are presented.