Series in Quantum Electronics
Marc Jungo
Spatiotemporal VCSEL Model for
Advanced Simulations of Optical Links
This work presents a highly efficient time-domain Vertical-Cavity Surface-Emitting Laser (VCSEL) model aimed at optimizing entire optical links. Ist spatiotemporal nature allows investigations of advanced effects, such as gain competition and resulting multimode behavior. However, it also makes the model numerically demanding due to the need for spatial discretization, and therefore inappropriate for system-oriented simulations. Thus, a mathematical transformation of the model based on physical and geometrical properties of VCSELs is proposed, which allows removing any explicit spatial dependency from the equations without losing information. Typical simulation times required by the modified model are reduced by several orders of magnitude compared to the initial algorithm, without noticeable reduction of the accuracy. Furthermore, radically new methods for computing static VCSEL responses are derived based on the model’s reformulation in the form of ordinary differential equations. An efficient method is proposed, which allows computing dynamically the coupling efficiency into a waveguide. Resulting spatial filtering and mode partition are shown to significantly alter the performance of the entire link.
About the author:
Marc Xavier Jungo was born in Fribourg, Switzerland, in 1974. He graduated in micro-engineering from the Swiss Federal Institute of Technology, Lausanne (EPFL) in 1999, after a master’s thesis in the Nanoscale Silicon Research Group (NSRG) of the University of Rochester, NY, USA. During this project, he investigated the carrier transport mechanisms in nanocrystalline silicon superlattices. Between 1999 and 2002, he has been working as a research and teaching assistant in the Laboratory for Electromagnetic Fields and Microwave Electronics of the Swiss Federal Institute of Technology, Zürich (ETHZ). He has primarily been involved with the characterization and modeling of VCSELs for dense parallel optical interconnect applications.
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