Helios can detect an incoming laser beam and identify its key characteristics, such as power, wavelength, pulse frequency and its source. Helios then interferes with the beam control – possibly by firing back a low-power laser of its own – so the attacking laser cannot fix on the target. “It provides permanent protection,” says Goldberg. “It’s not just buying time.”
He will not say exactly how the interference is done, but it may involve fooling the control system into thinking it is hitting its target despite the laser actually pointing a few metres to the side. A direct hit would have produced a big burst of reflected light, so a pulse sent back by an anti-laser laser could make it look like the original laser was on target.
Helios Counter Directed Energy Weapon System
Helios is a low SWaP, completely passive Counter Directed Energy Weapon system capable of nullifying the enemy’s DEW. Consisting of a small UAV-mounted sensor package, Helios provides full analysis of the incoming DEW beam including localization and intensity. With this information it passively jams the enemy, protecting the vehicle and the payload.
SOURCES- New Scientist, Adsys Controls