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Ansys Learning Forum Forums Discuss Simulation Photonics – Chinese 如何測量長直波導入射以及出射耗散 Reply To: 如何測量長直波導入射以及出射耗散

Guilin Sun
Ansys Employee

長直波導在理想情况下(没有表面粗糙度),光强度的衰减仅与有效折射率虚部有关,因此完全没有必要测量,可以用FDE计算或者模式光源里面自选模式,就可以得到有效折射率虚部和损耗,参见 Working with lossy modes and dB/m to κ conversion

精确计算需要合理设置FDE尺寸和PML距离。

当然,如果一定要仿真测量,或者直波导端面出射情况也是可以的,参见 Facet reflection and transmission calculations

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