# Can I use an optical fiber to direct a laser cutter? [closed]

Specifically, a 100W CO2 laser. Are there any considerations other than the maximum power for a fiber?

• What happened when you Google-searched for "CO2 laser fiber optic delivery system" ? Feb 23 '18 at 16:40
• @CarlWitthoft, the search got flooded with fiber lasers. Feb 24 '18 at 21:54

Addition: For any laser, whether CO2 or solid state, the laser needs a minimum beam quality (minimum meaning the $M^2$ should be sufficiently small) so that you can guide it with a given fibre. The numerical aperture NA and the core diameter $d_k$ of the fibre are the important values, giving you the following condition for the maximum beam parameter product your laser beam is allowed to have if it should be coupled into a given fibre.
$NA \cdot \frac{d_k}{2} \geq \frac{d_f \cdot \Theta}{4}$