The increased use of optics in information processing and transmission systems motivates the development of self-consistent opto-electronic transient simulators. This letter presents a technique to significantly improve the DC and transient convergence behavior of a modified nodal analysis based optoelectronic simulation framework by allowing optical device models to be “switched” between a linear formulation using real and imaginary fields to a non-linear magnitude and phase representation. Configurable multilayer filters and optical ring modulators are used as examples to demonstrate the effectiveness of this approach in obtaining robust simulation convergence.

Accurate simulation of large interconnect networks has become a necessity to address signal integrity issues in high-speed designs. Recently, several model-reduction techniques based on Krylov-space methods have been proposed for efficient simulation of large linear networks, However, these methods treat the distributed networks in terms of their lumped representations. In order to overcome this difficulty, a new technique based on congruent transformation is presented in this paper to directly include distributed systems described by Telegrapher's partial differential equations,.

A new algorithm based on Krylov subspace methods is proposed for model-reduction of large nonlinear circuits.Reduction is obtained by projecting the original system described by nonlinear differential equations into a subspace of a lower dimension.The reduced model can be simulated using conventional numerical integration techniques.Significant reduction in computational expense is achieved as the size of the reduced equations is much less than that of the original system.1.