Kang Donggil

I'm sorry for the late reply. As you said, the example I referred to is "Traveling Wave Mach-Zehnder Modulator – Ansys Optics".  Additionally, we tried the method of impulse response by referring to the example of "Ring modulator time domain (INTERCONNECT) – Ansys Optics", but we didn't get the desired result. In the example of ring modulator time domain, the result was consistent even if we changed sample rate(In the example script, it is represented by f span), but in my case, when we changed sample rate, we could see that EO bandwidth kept changing.