时间监视器

- March 17, 2023 at 2:26 am
  
  LLL
  Subscriber
  
  老师您好，仔细查看了fdtd100关于time monitor的视频还是没能理解从时间监视器中我们能获取什么信息
  以下是一个微环谐振器
  光源设置
  drop端time monitor的E
  drop端time monitor的spectrum
  请问E是不是能说明光源发出的光是一个一个的脉冲光呢？还能获取什么信息呢？
- March 17, 2023 at 5:07 pm
  
  Guilin Sun
  Ansys Employee
  
  一般情况下光源仅发出一个脉冲，你之所以看到很多脉冲，是因为环形谐振腔有耦合，光传播一圈有一部分透射或者反射，如此反复，知道所有的光能量衰减为零，就像教科书中推导谐振腔的透射反射率一样。
  时间监视器一般用来简单查看信号衰减情况，也可以提供傅里叶变换查看谐振情况，另外还可以用来计算群速度和损耗等，网上都有相关例子。
  多数情况下，线性光学仿真都不需要从时间监视器获得数据。
  你的结果显示仿真时间不够，参见
  Ansys Insight: 如何知道FDTD的仿真时间足够长
  Ansys Insight: 为什么说仿真时间要足够长才能得到正确的频域结果
- March 18, 2023 at 1:40 am
  
  LLL
  Subscriber
  
  感谢回复！请问一下仅发出一种脉冲，那个脉冲包含我设置的波段的所有波长吗？
- March 20, 2023 at 3:41 pm
  
  Guilin Sun
  Ansys Employee
  
  这是必须的，你在光源设置波长范围后，这个脉冲一定包含所指定的波长。你看看之前的截图。

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