  Silicon photonic integrated circuit (PIC) builds on the demand for a low cost
approach from established silicon-based manufacturing infrastructure
traditionally built for electronics. Besides its natural abundance, silicon has
desirable properties such as optically low loss (at certain critical
wavelengths), and small form factor to enable high density scaled-up optical
on-chip circuitry. However, given its indirect bandgap, the platform is
typically integrated with other direct bandgap (e.g., III-V semiconductor)
platforms for on-chip light source. An effective solution to integrating light
source onto silicon photonics platform is integral to a practical scaled-up and
full-fledged integrated photonics implementation. Here, we discuss the
integration solutions, and present our foundry's perspective toward realizing
it.
