ModeSYS supports the design and simulation of multimode fiber optic systems. With a primary focus on data communication applications, Synopsys OptSim allows users to evaluate both temporal and spatial attributes of optical signal propagation. Modeling of Electronic Dispersion. 3D Interconnect Designer provides a flexible modeling and optimization environment for any advanced interconnect structure, including chiplets, stacked die, packages, and PCBs. RSoft participated in TIA working group on modal dependence of multimode fiber bandwidth since 2001 and developed tools to address TIA needs Our objective is to use our. RSoft Design has released Optical Communication Design Suite version 4. July 20, 2005 Ossining, NY -- RSoft Design Group, a provider of photonics design automation software.