Optically integrated InP-Si 3 N 4 hybrid laser

We present the first demonstration of an optically integrated InP-Si 3 N 4 hybrid laser. The feasibility and viability of facet-to-facet, butt-coupled integration is proven by single-frequency operation, tunable across a wide range of 43 nm (including the entire telecom C-band) with sub-MHz spectral bandwidth.