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您好,您可以参考这个波导taper案例来仿真Spot size converter – Ansys Optics 。

首先使用FDE求解模场参见FDE solver analysis window overview – Ansys Optics 设置求解波长,然后使用EME solver EME Solver analysis window overview – Ansys Optics 选择您要传输的mode,参考案例设置Spot size converter – Ansys Optics  

由于您要仿的是拉锥光纤,注意创建几何体时使用 custom,使用旋转方式获得拉锥圆柱。