Good question,...Ive never tried it,...seems possible..
Still of course it still is not a laser obviuosly.
And because it is not a coherent source it would never be able
to be a straight line. Laws of physics thing..
The beam is only as good as its source.
So I dont think the fiber would help because when the light escapes out of
the end of the fiber,.. it will spread again,,..Because it is a non-coherent beam.
To have a coherent beam -
It must have bombardment of photons from excited atoms/ions/molecules to the next in line ..
a chain of bombardment sortaspeak.
Also a pair of mirrors, one at each end of the laser forming a resonator ,
which allow stimulated light to bounce back and forth through the lasing medium.
Usually, one of the mirrors is totally reflective while the other is partially transparent to allow the laser beam to escape.
This is what forms the coherent line..
From what Ive read so far is what you will have is a smaller image of the emitter...
But even if you could focus it down to a very small (sub millimeter) spot it would still spread!!!
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