MODE 倾斜光栅旋转问题

- March 26, 2022 at 9:16 am
  
  mouxin
  Subscriber
  
  新问题不知道怎么发不出来，只能新发帖子，抱歉
  如果用FDTD做倾斜光纤光栅时需要把整个光栅周期都画出来吗？这样需要的仿真内存会不会太大？能不能通过设置边界条件减小仿真所需的内存呢？
  MODE里的fiber Bragg grating 的例子，我改一下倾斜角度和周期，然后把仿真区域放大到仍然覆盖倾斜后的光栅结构，能不能实现倾斜光纤光栅的效果？
- March 28, 2022 at 5:34 pm
  
  Guilin Sun
  Ansys Employee
  
  “如果旋转角度不大，光栅周期也刚好合适，两个光栅间的这个坡面对仿真结果有影响吗？” 原则上是有影响的，参见大角度情况。你可以看看，如果你拷贝这个周期，重复几次，就不是你想要的结构：旋转光纤也不行，因为斜的物体没法沿轴重复：
  因此这种情况只能仿真有限大小的结构，全部都画出来，要实现你需要的长结构结构，可能比较困难，很困难。
- March 29, 2022 at 1:46 am
  
  mouxin
  Subscriber
  
  好的，我明白了，谢谢您！

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