Heterogeneously integrated ligtht sources on bulk-silicon platform

Heterogeneously integrated single $-\lambda$ and $\lambda$ -tunable light sources on bulk-silicon platform are presented. Thanks to the thermal advantage of the bulk-silicon platform, the single- $\lambda$ source showed WPE of 8% up to 70°C, feasibility of 25Gb/s direct modulation, and 70°C MTTF of ∼46000h. The $\lambda$ -tunable source showed 42.2nm tuning range. This result completes the optical device library suite for the bulk-silicon platform used in most semiconductor products.