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Cutting Laser Via Fiber

uMinded

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I would like to build my own laser cutter but am not sure how powerful I will be forced to go. I see fancy modules like this one:
Industrial 808nm 3000mw Infrared Focusable Laser Diode Module Cutter w/TTL

And I know if you pulse the diode you can get more out of it but I do not know how much I can. My goal is to have the laser feed into a fiber optic cable and focus at the very end instead of bouncing it off mirrors and having out of focus spots on large travels.

LASER FIBER >250cm BURN CNC REPRAP LASER FIBER 3D PRINTER CUTTER

Something like that can handle 300W of 808nm power and it would be a lot safer than mirrors I would think.

I would like to price out two machines with very different capabilities:
1) Cutting card stock, max thickness of a manila folder. IT would be nice if I could raster images into wood and acrylic as well.

2) Cutting wood and acrylic, 3 - 6mm (1/8 - 1/4")

I know you can get 50W CO2 laser tubes but I want to see if it is possible to do it with fiber for safety. Can you a 50W CO2 laser down a fiber without destroying it?
 

AUS

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I could be wrong, but I think you will probably find there is a lot of attenuation in optic fibre, plus is can screw up the beam shape. Commercial CO2 laser engravers usually have a fixed CO2 tube and use two mirrors.

There was some discussion about that here. I know I didn't get much out of the end of an optic fibre patch lead
 

Flaminpyro

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Well what do they use in the big metal cutting lasers that cut steel plate, how are there optics rigged ?

They probably start out with so much power it doesn't matter if they used a drain pipe for optics :crackup:
 
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