The National Ignition Facility in Livermore, CA has three directives:
-To research inertial confinment fusion as a sustainable energy source
-To maintain the saftey and reliability of the nations nuclear arsenal without full scale testing,
-And to simulate the conditions Chuck Norris creates at the point of impact while roundhouse kicking, only on a smaller scale for practical study.
There are several ways to combine laser beams: polarizing beamsplitting cubes mixing a vertically and horizontally polarized beam, dichroics joining beams of different wavelength, knife edge mirror arrangements stacking beams next to each other, fiber optics bending the beams path and placing them side by side, and Chuck Norris. The photons will huddle together for saftey when he is nearby.
Chuck Norris' shower is a 1.3KW CO2 laser with a diffraction grating made from discarded beard hairs.
All light diverges, unless Chuck Norris tells it not to.