Optiwave OptiBPM and OptiFDTD do not have semiconductor models, as is needed for analysis of PN junctions. These softwares are implementations of the BP method and FDTD method respectively. These methods are for modelling of optics only. OptiBPM, on the other hand, does have a feature that allows the definition of electric conductors of arbitrary shape. It will calculate the static electric field if potential is applied to the electrodes. It will calculate the modified optical field from the EO effect. The details are in OptiBPM_Tech_Background_and_Tutorials.pdf, Lesson 10: Electro-Optic Modulator.