I am using sample files from this KB: Single-mode fiber coupling in OpticStudio
Why does the coupling efficiency value differ in the POP window vs POPD operand in MFE?
![](https://uploads-us-west-2.insided.com/zemax-en/attachment/6064da0b-05f9-4824-8056-bd758fde0027.png)
![](https://uploads-us-west-2.insided.com/zemax-en/attachment/441716ba-b252-4a80-ba5f-960d470e0458.png)
I am using sample files from this KB: Single-mode fiber coupling in OpticStudio
Why does the coupling efficiency value differ in the POP window vs POPD operand in MFE?
Oh never mind. It is clearly mentioned in the manual that POP settings need to be ‘SAVED’ in order to take effect. Once that step was done, all values matched.
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