If you have ever seen a laser cutter working there is SMOKE. Cutting steel, wood, paper, plastic, leather, whatever, there is smoke, a LOT of smoke that must be removed from the work space.
There is a lot water content in a live tree all of that has to be vaporized before the wood burns. IF the laser was indeed powerful enough to cut the tree from that distance, vaporizing that much material in that short, 1-2 second, amount of time would result in a near explosion of the wood due to vaporizing all of the water content.
All of the laser cut edges I have seen are relatively smooth. If you look closely at the tree cuts, they look a lot like chainsaw cuts to me. Looks like someone used a torch to blacken the wood. They even held it too long in one spot in the photo and charred the wood too much.
Click photo to enlarge
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You would think YouTube would be cluttered with videos of this if it were true. But there are only a few laser related videos there all of dubious validity.
As always, I am open to being shown real evidence, but I have not see any yet. Seeing is NOT believing these days!!!