Does that require laser input, or electrical?
We can supply either one, but I was thinking the elegance of several hundred laser beams coalescing into a Jedi-like "light saber" would be awesome!
We've seen similar collected beams in "Independence Day" and on the Death Star.
Electric. With a bit of magneto-kinetic storage tossed in. Completely invisibile beam but the split itself would release photons during the annihilation event. If you want a "targeting laser" for showmenship purposes, we can always use the signaling lasers.