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老师，你好，想问下这个耦合效率怎么计算呢?

- October 29, 2024 at 9:28 am
  
  2654552850
  Subscriber
  
  我搭建了一个光栅耦合器，参考文献里说它的耦合效率是向上耦合效率和向上衍
  射模斑与单模光纤模斑的重叠积分的乘积，我用的port组，但我不知道该怎么计算最终的耦合效率。附图是我的仿真和我直接从放在光纤里的监视器看到的T的结果。
- October 30, 2024 at 6:18 pm
  
  Guilin Sun
  Ansys Employee
  
  如果你已经研究清楚，耦合效率是向上耦合效率和向上衍射模斑与单模光纤模斑的重叠积分的乘积，比较好办：
  向上耦合效率是不是就是光纤里监测的透射率？如果是，就好办；
  向上衍射模斑是不是就是光纤里监视器得到的总场？或者是在间隔处的总场？总之这个总场是可以得到的。Port里监视器有总场，或者再添加新的监视器。
  单模光纤模斑：是指垂直于光纤轴的还是倾斜的？这个你是可以得到的。
  这两个模场EH得到后，写脚本自己计算Overlap ，参见 https://optics.ansys.com/hc/en-us/articles/360034405254-overlap-Script-command
  
  以后请到中文光子学专题论坛发帖 Photonics – Chinese

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