TLM analysis of multimode interference devices

In this article, the use of the transmission line matrix (TLM) method for the analysis of multimode interference (MMI) devices is demonstrated. Time domain solvers of Maxwell equations, such as the TLM method, are a highly accurate alternative in the modeling of photonic devices that permit overcoming the limitations found in other approximate methods. The full optical transfer function is obtained from the computation of the device response to a single input temporal pulse. A novel parallel computation scheme based on a sliding window wave propagator permits reduction of the high computational load requirements.