Small 1kW blinding sensor, 10kW intercept UAV, reach about 1MW can intercept short-range ballistic missile weapons. Currently used for laser is mainly three kinds of chemical laser beams, solid-state laser, free electron laser power. The chemical laser can obtain the most, actually can be used early to intercept ballistic missiles.
But laser beams requires expensive chemicals, and efficiency is not high, so now the military is more inclined to the free electron laser, free electron laser away from the front of professionals already mentioned, will not repeat them. Generally speaking, this is a power driven by laser, and has a great advantage is the wavelength tunable. But at present, the power is slightly lower.
But laser beams is currently the biggest defect is still lack of power and reliability is not high, I was put into use at least ten years, and has practical application in military combat probably not half a century, and the reliability problems caused by weather disturbances may be difficult to have a better solution.
Laser beams also have to consider the whereabouts of the destruction, so look, not what side effects of laser power, the gasification of nuclear weapons and missiles have what problem. Look at the attack effect, nuclear weapons is a wide range of AOE laser is single high injury, can destroy the target, high speed, close to the speed of light, hard to dodge.