Nitrogen laser – the power beam.
One laser powering another laser. Does that work? In science, the strong laser impulses of nitrogen lasers are used for powering a dye laser. Experts refer to this as "pumping".
Nitrogen lasers work in the ultraviolet range and are generally used for scientific purposes. Nitrogen lasers work without resonators and therefore without mirrors. The reason: The impulses of the laser are simply too short.
Even the generated light would take too long to be reflected and use the atoms. This usually happens to optimise the energy performance of a laser. That is not the case here.
And that is why nitrogen lasers which work without a resonator are also called super beams. The laser source and the laser medium have to produce the power without an "amplifier".