How to make your own fat optical fiber for solar device?
I'm prototyping a solar energy device, and need to transport a concentrated light beam a couple of meters without loss or, ideally, burning anyone's hand off.
I was thinking of some kind of 'total internal reflection' medium, such as glass, but it needs to be cheap and easy to make/find, and it would be great if it had at least a little flexibility.
Is there any way to make your own? Some kind of gel, or crystal, or maybe water if it wouldn't attenuate or absorb too much of the energy?
Failing that, is there some existing material I could wrench out the back of something?