Laser weapon technology is a lie and an impossible myth but a high power functioning laser for maybe waste disposal or similar uses is a plausible concept if we consider the physical attributes involved. 1. A beam of light 2. Propagation 3. Medium 4. Permeability A beam of light propagating through a medium will only concentrate in magnitude if the opposing permeability of the medium is sufficient enough to congest spatial points with photons , increasing the density and mass energy that occupies each individual spatial point.