Zemax Single-mode Fiber Aperture Settings
The system aperture shoud be set to object space NA with the NA value matching the fiber. For multi-mode fiber coupling, see "Calculating efficiency of multi-mode fibers". The Surface Properties can be reached by clicking the down arrow in the Surface Properties bar above the Lens Data Editor. I am trying to optimize for a lens which is supposed to couple light from a collimated beam into a single mode fiber.
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