Directed Energy Weapons: Lasers and Railguns

Directed energy weapons are transitioning from science fiction to battlefield reality, with high-energy lasers now capable of destroying unmanned aerial vehicles, small boats, and incoming rockets and mortars. These weapons offer revolutionary advantages including near-unlimited magazines, minimal cost per shot, and speed-of-light engagement. The challenge lies in scaling power levels to address more demanding threats.

The US military is leading directed energy weapon development across multiple programmes. The Army's DE-SHORAD programme integrates 50-kilowatt lasers on Stryker vehicles for short-range air defense against drones and rockets. The Navy has tested the HELIOS 60-kilowatt laser system aboard USS Preble. The Air Force is developing podded laser systems for fighter aircraft self-defense. These systems have demonstrated effectiveness against Group 1-3 drones and small caliber rockets.

Israel deployed the Iron Beam laser interception system, designed to complement Iron Dome by destroying short-range rockets and mortar rounds at far lower cost per intercept. While Iron Dome interceptors cost approximately $50,000 each, a laser shot costs roughly a few dollars in electricity. Against the massive salvoes Israel faces, this economic equation is transformative for sustained defense.

Electromagnetic railguns, which use electromagnetic force rather than chemical propellants to launch projectiles at hypersonic velocities, have faced more significant development challenges. The US Navy's railgun programme was paused, though the technology continues to advance. The principle of launching projectiles at Mach 7+ without explosive propellants offers advantages in safety, logistics, and range. China has reportedly conducted shipboard railgun tests.

The operational challenges include power generation and thermal management for sustained operations, atmospheric effects degrading laser beams at longer ranges, and the need for tracking systems accurate enough to keep a beam on target. As these challenges are solved through more capable power systems and improved beam control, directed energy weapons will become standard equipment.