... got recently some high-power laserdiodes with 200Watts@976nm on a spot of 0.2mm, so enough power and enery density for all sorts of metal-work (sintering, soldering, welding, cuting, ...).
Actually building drivers and controllers for "additive metal wire fusing", but could be easier for powder, than for wires.
Here a thread showing first experiments with the 200W-diode - https://reprap.org/forum/read.php?133,235148,page=5
Viktor