AN/SEQ-3 Laser Weapon System

 

The AN/SEQ-3 Laser Weapon System or XN-1 LaWS^[1] is a laser weapon developed by the United States Navy. The weapon was installed on USS Ponce for field testing in 2014. In December 2014, the United States Navy reported that the LaWS system worked perfectly against low-end asymmetric threats, and that the commander of Ponce was authorized to use the system as a defensive weapon.

The LaWS is a ship-defense system that has so far publicly engaged an unmanned aerial vehicle (UAV or drone) and a simulated small-boat attacker. LaWS uses an infrared beam from a solid-state laser array which can be tuned to high output to destroy a target or low output to warn or cripple the sensors of a target. One of its advantages over projectile weapons is the low cost per shot: Each firing of the weapon requires only the minimal cost of generating the energetic pulse; by contrast, ordnance for projectile weapons must be designed, manufactured, handled, transported, and maintained, and takes up storage space.

The LaWS is designed to be used against low-end asymmetric threats. Scalable power levels allow it to be used on low power to dazzle a person's eye non-lethally to turn away a threat, and to be used at high power, up to 30,000 watts (30 kW), to fry sensors, burn out motors, and detonate explosive materials. By lasing a vital point, LaWS can shoot down a small UAV in as little as two seconds. When facing small boats, the laser can target a craft's motor to disable it, then repeat this against other boats in rapid succession, requiring only a few seconds of firing per boat. Targeting the platform is more effective than targeting individual crewmembers, although the LaWS is accurate enough to target explosive rockets if on board, whose detonations could kill the operators. Against a larger aircraft like a helicopter, LaWS can burn through some vital components to cause it to crash.

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