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fiber optic
coupling in a misaligned SM fiber optic


gaussian beam focused by a lens into a single mode fiber with a longitudinal shift


Caution
Fill in all input cells.
Choose all parameters unit.
Distances are algebric.
Positive direction is according the horizontal arrow in the bottom right of the scheme

InputValueunit
wo
wf
x
fi
lam
dz
T
OutputValueUnit
Cto be calculated
gaussian beam focused by a lens into a single mode fiber with a longitudinal shift
wo : waist radius of the incident gaussian beam wf : mode radius of the fiber optic x : distance from the lens to the waist of the incident gaussian beam fi : back focal length of the lens lam : wavelength dz : defocus of the fiber optic ( focus is supposed to be achieved when fiber optic entrance and waist of the refracted beam are merging ) T : transmission coefficient at the entrance of the fiber optic C : coupling ratio

Note
This calculation page can not detect all unrealistic inputs.



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