TRW's Tactical High Energy Laser/Advanced
Technology Demonstrator (THEL/ACTD) uses a
high-energy chemical laser, to destroy short
threats such as Katyusha rockets "at the speed of light.
It's chemical laser technology, has been around for yrs.
The key to THEL is recent advances in optics and tracking systems.
Relatively cheap, it is designed to destroy small tactical munitions,
like artillery shells and rocket artillery, cruise missiles, etc.