July 24, 2024 at 9:22 pm
Kyle
Ansys Employee

Hello,

  1. Which parameters are you changing? It's possible that they may only be having a small effect at the frequency of the sine wave. Also, keep in mind that the output of this element is not the voltage across the terminating impedance, it is the effective voltage experienced by the optical pulse as it travels through the modulator. Some expected results for transmission lines might not apply to this element. This page (and the included reference) have more information on this model: Traveling Wave Electrode (TW) - INTERCONNECT Element – Ansys Optics
  2. In a time domain simulation the frequency-dependent properties of this element are modelled with a finite impulse response digital filter. This digital filter includes an artificial delay, which is why you're seeing a delay in the output. In most cases this constant delay won't have an effect on the results of the simulation so it is generally ignored.