13 December 2001 Time-domain simulation of optical multimode chip-to-chip interconnects
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Abstract
To increase the bandwidth of high-performance chip-to-chip interconnects optical on-board interconnects can be used. Since the design procedure of such optical interconnects has to be widely compatible with current computer aided board design processes, adequate simulation methods are required. In this paper an efficient and design process compatible method for simulating the transmission behavior of optical multimode chip-to-chip interconnects is presented. The approach is based on a time domain description where an optical multimode waveguide is represented by a multiport. The different transfer paths between the input- and output ports describe the transmission behavior of the entire waveguide. The transmission behavior of each individual path can be characterized by its step response, which can be computed by the aid of an extended ray tracing method. Due to some fundamental properties of these step responses, its piecewise approximation by simple exponential functions is possible. As a consequence the pulse responses of each transfer path can be determined analytically and they are also approximated by exponential functions. Finally this procedure enables the application of a semi-analytic recursive convolution method for the computation of the waveguide transmission behavior. The simulation procedure is illustrated and discussed by a set of examples.
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Elmar Griese, Juergen Schrage, Jens Gerling, Gerd Mrozynski, "Time-domain simulation of optical multimode chip-to-chip interconnects", Proc. SPIE 4455, Micro- and Nano-optics for Optical Interconnection and Information Processing, (13 December 2001); doi: 10.1117/12.450433; https://doi.org/10.1117/12.450433
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