October 4, 2023 at 3:59 pm
Devika
Ansys Employee

Hello Nazym,

It is normal. "The overshoot and ringdown behavior, is expected when one considers the dynamics of the cavity resonance.

You can find more information here:  " INTERCONNECT: Enabling time and frequency domain simulation of photonic integrated circuits with microring modulators (lumerical.com)

Thanks 

Devika