Is laser spine surgery effective and safe?

Yes and yes: When indicated and on the hands of an experienced surgeon.

Safe not effective: Laser spine surgery simply means removing disc with a laser rather than manually. It is typically performed percutaneously. Although there are reported benefits, in order to state that it is effective, those benefits have to beat the placebo effect which is considerable. Most of the laser surgeries done are for disc bulge which doesn't need surgery in the first place.