Self-consistent modal field analysis of injection-laser devices

The paper reports a new method of modal field analysis specifically designed to allow simulation of certain types of multiple coupled waveguides. The analysis, based on a transverse resonance method, allows direct determination of a required optical mode (or supermode) in waveguides of arbitrary complex permittivity profiles. The method solves Maxwell´s equations and includes a stability analysis to improve accuracy. The feasibility of using this numerical method in a self-consistent laser simulation has been investigated by modelling the operation of inverted-rib-waveguide structures. Good agreement has been obtained with experimental observation.