Army Deploys 20‑kW Laser to Shoot Down Drones

Overview of the Operation

On the night of August 25 and the early hours of August 26, 2024, the U.S. Army’s Joint Task Force Southern Border (JTF‑SB) executed a high‑profile counter‑drone mission in the Rio Grande Valley, Texas. Using a 20‑kilowatt high‑energy laser mounted on a military vehicle, the unit intercepted and destroyed three drones that were deemed to pose a physical threat to U.S. military personnel and CBP partners. The engagement, conducted under the umbrella of U.S. Northern Command, marked the first operational deployment of AeroVironment’s Locust Laser Weapon System (L‑LWS) in a real‑world border security scenario.

The drones, likely small unmanned aerial vehicles (UAVs) operating in the 30‑to‑50 km altitude band, were tracked by a combination of ground‑based radar and electro‑optical sensors. Once within lethal range, the laser fired a series of high‑energy pulses that vaporized the drones’ airframes, leaving no debris or secondary hazards. The operation demonstrated the feasibility of laser‑based kinetic deterrence in a contested environment and underscored the growing importance of directed‑energy weapons in modern defense portfolios.

Technical Breakdown of the Locust Laser System

AeroVironment’s Locust platform is a modular, vehicle‑mounted laser weapon designed for rapid deployment and scalability. Key technical attributes include:

• Power Output: 20 kW continuous‑wave (CW) laser, capable of delivering sufficient photon flux to ablate target structures within seconds.
• Beam Quality: Advanced adaptive optics correct atmospheric turbulence, maintaining a diffraction‑limited spot size at ranges up to 5 km.
• Thermal Management: Integrated liquid‑cooling loops and heat‑pipe arrays dissipate excess heat, enabling sustained firing for up to 30 minutes per session.
• Control Architecture: A closed‑loop guidance system links the laser’s pointing mechanism to real‑time target tracking data, ensuring sub‑arcsecond accuracy.
• Mobility: The system is mounted on a 4×4 tactical vehicle, allowing rapid repositioning across the border corridor.

The Locust is part of the broader AMP‑HEL (High‑Energy Multipurpose Laser) program, which aims to field a suite of high‑energy laser (HEL) platforms across the U.S. Armed Forces. The program’s milestones—delivery of the first two functional prototypes in September 2025 and the subsequent improved systems in December 2025—highlight a rapid development cycle driven by both technological innovation and operational urgency.

Why 20 kW Matters

In the context of counter‑drone operations, laser power directly correlates with engagement envelope and kill probability. A 20 kW system can:

• Engage multiple targets simultaneously by rapidly cycling the beam between points of interest.
• Maintain engagement against drones with higher endurance or faster speeds, which would otherwise outpace kinetic interceptors.
• Reduce collateral damage by delivering

precise, instantaneous energy to the target, eliminating the need for explosive warheads and minimizing the risk to nearby civilians or infrastructure.

Operational Impact and Lessons Learned

The successful engagement demonstrated several key capabilities:

• Rapid Threat Neutralization – The laser’s ability to transition between multiple drones in under a second reduced the window of exposure for personnel on the ground.
• Low Logistical Footprint – Unlike traditional kinetic interceptors, the system requires only electrical power and a modest supply of coolant, simplifying resupply chains in remote border outposts.
• Scalable Architecture – The modular design allows the same laser head to be integrated onto a variety of platforms, from light tactical vehicles to larger ground‑based shelters, providing flexibility for future missions.

Post‑mission debriefs highlighted the importance of integrating the laser’s sensor suite with existing border‑monitoring radars. By fusing data streams, operators achieved a “track‑while‑scan” capability that kept the laser locked on fast‑moving UAVs even in cluttered environments.

Future Deployments and Program Outlook

The AMP‑HEL program is slated to expand beyond the Southern Border:

1. Forward Operating Bases (FOBs) – Plans are under way to field 30‑kW and 50‑kW variants at forward bases in the Indo‑Pacific region, where the threat of swarming drones is a growing concern.
2. Naval Integration – AeroVironment is collaborating with the U.S. Navy to adapt the Locust’s laser head for ship‑board mounting, aiming to protect high‑value vessels from low‑altitude threats in littoral waters.
3. Joint Inter‑Service Exercises – The Army, Air Force, and Marine Corps are scheduling joint training events in 2027 to validate cross‑domain laser engagements, including integration with airborne laser platforms.

Funding for the next phase of AMP‑HEL has been earmarked in the FY 2027 defense budget, with an emphasis on improving beam‑control algorithms and reducing the system’s overall power consumption.

Challenges and Considerations

While the operation was a clear success, several hurdles remain:

• Atmospheric Attenuation – Dust, humidity, and temperature gradients can degrade beam quality.

Read the full breakdown originally published at https://ltdeveloperblogs.github.io/posts/the-army-just-used-a-20-kilowatt-laser-to-take-out-three-drones/