In May of 2012, RSoft was acquired by Synopsys, Inc. With facilities also in Ca, Japan and the UK, RSoft Inc develop and market CAD/simulation software for the design and simulation of optical waveguide and fiber-based photonic devices. Applications include design of WDM components, modulators and switches. Simulation is based on 2-D and 3-D scalar, semi or full vector finite difference beam propagation and includes mode solvers and Pade-based wide-angle options. RSoft Design Group, Inc. offers a comprehensive suite of design and business analysis software solutions to the telecommunications, photonics and semiconductor industries. RSoft Design Group provides a full range of simulation and planning software and services across the entire component to network-level hierarchy. The company's award-winning products are used by researchers, manufacturers, systems integrators, and service providers to address design challenges ranging from the physics of component design to the business implications of planning networks.