Photons per sec at 100 percent power

[gernreich]

@dan

Beam width is about 5mm.

@dan

Everyone’s basically got it here - in practice, the kerf is about 0.008 - 0.022 depending on material, settings, etc.

http://www.ophiropt.com/laser-measurement-instruments/laser-power-energy-meters/services/power-density-calculator

The ROUGH numbers I got were:
.5 cm diameter beam at 40 W → 203.72 W/cm2
.02032 cm (.008") diameter beam at 40 W → 123,345 W/cm2

I made the focal point the width of the smallest kerf. This could be smaller:

@nick07lee

Now at the focal point the laser has really great power density. It was mentioned in the Tech Specs, that the GF have a .008 kerf. So Im gonna guess it has a .005 Beam diameter.

.0127 cm (.005") diameter beam at 40 W → 316,000 W/cm2