Convergence behaviour of coupled electromagnetic/electronic high power laser models

An investigation into the convergence behaviour of two separate schemes for coupling the electromagnetic and electronic models in the simulation of a semiconductor laser is presented. One model couples the optical and electronic models once per optical round trip (separate solution model - SSM), whereas the other couples the optical and electronic models at each optical step along the cavity (coupled solution method - CSM). Results are presented using a simple 1D model to show that the CSM provides better numerical stability and faster convergence. Results are also presented from a more complex coupled laser model, based on a quasi-3D solution, which demonstrate that the CSM is capable of rapid convergence.