Block diagram modeling of quantum laser sources

The paper presents a method for modeling quantum laser sources. Quantum cascaded (QC), quantum dot (QD) and quantum dot cascaded (QDC) lasers are studied. Their block diagram models are devised. VisSim environment is used to achieve this purpose. Block diagram simulation results are validated against experimental published work and full agreements are obtained. Using of graphical user interface allows a quick experimentation with alternative values of performance parameters such as number of periods, life time ratio, and dipole matrix element of laser sources. Moreover, implicit solutions of dynamic equations governing laser sources provide exact handling of the device performance. Analytical treatment is also conducted. This explicit solution showed less accurate representation of the studied laser sources compared to block diagram models. Several performance parameters are tuned to enhance the performance of these laser sources through the presented methodology. The resultant performance characteristics and comparison among quantum laser sources are presented in this work.