Monolithic integrated InGaAsP/InP distributed feedback laser with Y-branching waveguide and a monitoring photodetector grown by metalorganic chemical vapor deposition

We have fabricated an integrated 1.5 μm distributed feedback laser (DFB) with a Y-branching waveguide and a monitoring photodetector, grown entirely by metalorganic chemical vapor deposition. The integrated device is designed to resolve the frontface-backface mistracking problem of the DFB laser and to demonstrate monolithic integration of fundamental building blocks for photonic integrated circuits.