COMPARISON BETWEEN POWER MATRIX MODEL AND TIME-DOMAIN MODEL IN MODELING LARGE-SIGNAL RESPONSES OF DFB LASERS

Two different modelling tools have been proposed recently for the inve stigation of large signal dynamic responses of distributed feedback la sers: power matrix model a mixed time frequency model and time domain model. The paper presents quantitative comparisons between these two m odels and shows very good agreement for both large and small signal ch aracteristics, which include longitudinal effects such as hole burning . An extensive comparison has been made for both single moded and doub le moded devices with the former demonstrating instability at high pow ers. The advantages of each model's features are also discussed.