Simulation of 1.55 μm distributed feedback semiconductor laser: investigation of dielectric grating yielding high coupling effect

摘要

A novel dielectric grating for semiconductor distributed feedback laser was proposed. A five-layer model was developed to examine the effect of the dielectric grating based on Coupled Mode Theory. The large refractive index difference between dielectric material and InP yields much larger coupling coefficient and provides greater spatial flexibility in grating design and fabrication, resulting in improved efficiency of the gratings.