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

Abstract
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 photonicintegrated circuits.