[urgent] how to create a Cone structure in layout of OptiBPM??

[Dino Cen]

Hi everyone,

Now i am using OptiBPM of an old version. I need to create a Cone structure in the layout. At first, i tried to use the tapered fiber with setting its beginning width at 30um and end width at 0. But when I checked the index profile, i found out the fiber is just tapered in the X-Z plane, but have the same width along the fiber in the Y-Z plane, not tapered in the Y-Z plane.
Does anyone know how to make a round fiber tapered in both planes??

Thank you very much.

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