High level modeling in optoelectronic systems: transmission line application

This paper presents different VHDL-AMS modeling techniques to create and improve operational models of optoelectronic components, such as vertical cavity surface emitting lasers (VCSELs) and multimode optical fibers. Our models are designed for designers and developers of optoelectronic transmission systems and intended not to replace the models created with specialized software in the domain of optics and optoelectronics but to help system designers to model the physical level. The modeling technique used is the progressive “top-down” approach; it serves to describe lows-levels abstraction in terms of highs-levels abstraction. We have modeled one by one the physical phenomena of each system component by introducing the main disturbances such as noise in the VCSEL, and fiber attenuation effects for knowing the influence of parasites parameters and transmission limitations according to the length of each fiber type. Our objective is to construct a globally accurate model taking into account the multidisciplinary effects that make up the entire optoelectronic transmission line including electrical, thermal and optical behaviors and to find the method to integrate them into a modern design tool. The simulation results are positively compared with models results published in literature.