Handheld laser welder - GIF

[Frank S]

Where's the bead material coming from? Some sort of wire or powdered MiG?

The weld bead probably comes from reduction of base metal fusion. A lot of tig welders will make welds without any filler. I do it all the time when welding tubing with an oyx acyt torch

[rdarrylb]

Looks very interesting! Is there more info available on this???

[McDesign]

Sure, I do, too - but there's clearly a raised bead.