Accurate time-domain analysis of microwave and optical signal interaction in electrooptic devices

This paper presents a novel formalism based on the application of the generalized telegrapher´s equations to the modeling and designing of integrated electrooptical devices. In this approach, we eliminate the restrictions commonly introduced in the past, such as a weakly guiding condition and isotropic unperturbed medium, while evaluating the modulator time response to an arbitrary modulating signal. Small dielectric perturbations and a large difference between the optical and modulating signal frequencies are the only hypotheses used in deriving the linear model. By applying a multiple-scale perturbation method, we reach an analytical solution to the problem of multipolarization interaction. Some applications are discussed.