These aren't diodes, but solid state fiber. Oddly enough, there is nothing "new" about these.
Look up the LaWS. It's owned by the Dep. of the Navy, and mounted to a destroyer I believe. There are videos of it incinerating a drone. These things operate in the kW to MW range. To say they are BEASTS would be an insult.
Good, I didn't like the sounds of those chem lasers they were talking 'bout using. are these just Nd: lasers, or is there something special about a fiber laser vs. solid state, besides the "flexibility" of the gain medium?