CNN gave more details on the incident, first the laser was green and second it burned a hole in the pilots retina.

The color and power means the laser was almost certainly a frequency doubled Neodymium:YAG, wavelength of 532 nm. If the beam illuminated the cockpit for more than a second thin it was probably intentional. I use 6 such YAGs at work, each capable of putting out ~50-60 watts...(dont worry, the YAG light never leaves the laser enclosure).

It was after sunset at the time of the incident, so it might have been from a laser show, but a brief google search found no such outdoor shows advertised. It only would take a power density of a few milliwats per square centimeter to damage an eye.