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The spike in the dynamic response

    • nazym.alipbayeva

      Good evening,

      Could you please tell me what can cause this spike in the beginning of the dynamic response? I get it each time when I run the simulation. The different parameters have been changed. But this spike keeps appearing every time. 

      I am working with a circuit that contains several micro-ring resonators. But even when I use only one MRR, this spike appears.


      Thank you in advance!


    • 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 (



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