使用FDE进行frequencysweep时在特定范围内出现跳模的情况

- September 15, 2023 at 1:59 am
  
  ceshi xiazai
  Subscriber
  
  各位老师好，我在FDE的使用上遇到这样一个问题，我对特定的梯形波导结构进行频率扫描，它有一个顶部宽度1700纳米，蚀刻深度350纳米，和总薄膜厚度700纳米。扫描记录TE00的数据进行GVD计算，然后发现在波长1.1到1.18um这样，出现了跳模，导致我这部分数据出错。请问应该怎么解决呢？
- September 15, 2023 at 4:12 pm
  
  Guilin Sun
  Ansys Employee
  
  你可能需要多选一些波长点，另外也可能需要多选number of test modes。这种波导如果尺寸变化大，模式特性变化较大，你可以在这个波长附近看其模式是怎么变化的，比如模式个数大大增加的话就可能找不到合适的模式。

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