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Photonics – Chinese

Photonics – Chinese

Topics related to Lumerical and more, in Chinese language.

关于耦合效率和透射率

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    • Shu Lin
      Subscriber

      老师好,请问计算耦合效率(dB)能不能直接用 耦合效率=10log(|T|),T为透射率,如下图的T值。

      1.55微米处的耦合效率就是10log(0.5)=-3dB

      这样对吗?

    • lixing
      Subscriber

      你可以对该图y轴数据做如下处理

      setplot(“log10y”)

      例如:

      • Shu Lin
        Subscriber

        您好,按照这个方法得到结果如下:

        但是只是改变了y轴,T的值没有变。

        请问如果要将T值从百分比换算成dB能不能用  耦合效率(dB)=10log(|T|)这个公式呢?

        感谢!

    • lixing
      Subscriber

      那你对T值提前处理在画图就可以了

      Tdb=10*log10(|T|);

      plot(lambda,Tdb);

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