关于用varFDTD进行微环中四波混频的仿真

- June 17, 2022 at 6:48 am
  
  zyshu
  Subscriber
  
  官网的案例中https://optics.ansys.com/hc/en-us/articles/360041718794给了一个半径为3.1um的微环的四波混频FWM的仿真案例，并得到了如下的三个波长的图
  我在将微环的半径改为15um后，并将Pump与Signal的波长均改为15um相应的谐振波长，但得到的结果如下图所示，为何却得不到预期的三个波长的结果呢？
- June 17, 2022 at 3:17 pm
  
  Guilin Sun
  Ansys Employee
  
  根据结果看，应该是仿真时间不够，仿真早早结束的缘故。请大大增加仿真时间，比如100倍，让autoshutoff min决定合适中止仿真。
  
  另外的可能就是PML不够厚，你可以用Ruler大概测试一下。一般建议半个波长左右。
  
  估计是仿真数据为主要因素。
  - June 18, 2022 at 9:27 am
    
    zyshu
    Subscriber
    
    加大了PML的厚度后仿出来了，多谢老师！

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