Dear Zemax team,
I would need to model a single mode fiber with a 9 micron core and a NA 0.22 in a non sequential design. I envisioned to use a source Gaussian with beam size of 4.5e-3 mm, but I cannot understand the meaning of the Position parameter and I cannot figure out to which value I should set it in order to reproduce a 0.22 beam. Could you please help me with this?
Thanks
Best regards
Gabriele
+2
Hi Gabriele,
The position parameter sets the distance between the location of your source, and the virtual point source from which the rays appear to emanate. Something like this sketch:
Since you know the Numerical Aperture and the Size of the Beam, you can calculate Theta and the position distance Numerical aperture - Wikipedia
Dear Berta thanks a lot for your help.
Excellent.
Best regards
Gabriele
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