Two connected fibre optic cable ends are parallel but not quite touching. This is called

end to end coupling.
butt joint coupling.
lateral gap coupling.

Explanation from PART66Online

When two fibre ends are aligned parallel and held in close proximity without physically touching, the connection is termed end-to-end coupling. A butt joint implies the polished faces are brought into actual contact, while lateral gap describes a sideways offset rather than the small axial separation described here.

sandeeprego asked · 13 Jun 2013

answer has to be end fire coupling

Community Comments (2)

PART66Online 13 Jun 2013

I think you are wrong. End fire coupling is used when you need to couple two parallel beams (not cables) into 1 multimode fibre.

www3.imperial.ac.uk/pls/portallive/do...

g13unisol 2 Mar 2016

This question has thrown me as well end to end coupling is the joining of two fibre cable by aligning them carefully and bringing them in to close proximity of each other. End To End.

Parallel but not touching meaning side by side you use a lens to focus the beams in to a single fibre. Similar to the pdf above.

I could be completely wrong but if you look at other similar sites they will agree with me.

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Two connected fibre optic cable ends are parallel but not quite touching. This is called

Community Comments (2)

More discussions in 5. Digital techniques / Electronic instrument systems