Considering he's claiming its a 1000mW laser, I'm not sure I'd listen to anything he says. You can get a roughly collimated beam though by just sticking a strong lens at the right position in front of the diode. Also, The shape in the movie may just appear that way because the camera's sensor is "oversatured" due to oversensitivity to IR and the concentrated amounts of power.things said:how did this guy do this though, and it's a DX laser like mine except it is a 50mw.
What are you trying to do with the diode though? If you're having problems focusing it, you may either need to move the lens further away, or use a stronger lens. Divergence out of the diode chip can exceed 40 degrees o) in the fast axis so it takes a good bit of curvature to force it to a focus.