In a vacuum coherent light would travel for ever. So a 1 second laser burst would be like a cylinder of light travel thru space and time forever. So range isn't really a problem. You can bounce lasers off of lunar reflectors put there by Apollo astronauts. The focus only concentrates the energy.
Well, within the tolerance of the phase lock. If that wasn't literally perfect, or somehow constantly realigned by a phase alignment field traveling with it, the coherent waves would eventually separate into a disbursed, spreading vector pattern and just... dissipate. That's the flaw in the SciFi idea of sending information across space with lasers - space is really, REALLY big, and provides plenty of distance for a nice tight beam to turn into a suffused, random, dim, meaningless glow.