When most people hear the phrase laser weapon, they picture something out of science fiction — a glowing beam shooting across the sky toward a target and then carving through that target with ease, like a knife through butter.

The reality of lasers is very different.

Recently, the Joint Interagency Task Force 401 (JIATF 401) — the U.S. Department of War’s lead agency on C-UAS – worked alongside the Federal Aviation Administration (FAA) and completed a series of safety demonstrations at White Sands Missile Range in New Mexico using the Army’s Multipurpose High Energy Laser (AMP-HEL) system. These tests were designed specifically to answer the question many people are asking:

Can counter-drone lasers operate safely in mixed civilian airspace?

The short answer is yes — and the reason why comes down to how these systems are built and operated.

Over the past two decades as an engineer working in counter-UAS systems — including extensive testing of directed energy platforms — I’ve worked on systems designed with layered safety at their core. In the last four years alone, our LOCUST® team has conducted more than 66 test events and safely engaged over a thousand drone targets without incident.

That body of testing helps illustrate how these systems are engineered to operate safely in complex environments.

But how do they actually work?

LAYERS OF SAFETY

Most people imagine a laser weapon working like a laser gun in a science fiction movie: an operator points it, pulls the trigger, and a beam shoots toward the target.

In reality, modern laser systems operate much more like commercial aviation systems — with multiple independent safety layers designed to prevent a single mistake from creating a hazardous situation.

Every time an operator presses the “fire” button, the system runs through a series of automated checks. Some examples include:

• Is the laser pointing away from protected “keep-out” zones?
• Are all internal subsystems operating within safe parameters?
• Is the system properly locked onto a target?
• Are safety interlock switches engaged?
• Are all software safety checks satisfied?

Each of these checks acts as a safety “vote.”

If any subsystem registers a “no vote,” the laser simply will not fire. An operator can press the trigger — and nothing happens. The system refuses to engage until all conditions are verified as safe.

These automated safeguards are built into both the hardware and the software of the system.

A WIDER VIEW OF THE AIRSPACE

Laser systems also don’t operate alone.

They are connected to higher-level command and control (C2) systems that maintain awareness of everything flying in the surrounding airspace. These systems combine data from radar, aircraft transponders, and other sensors to create what is known as an Integrated Air Picture.

By fusing information from multiple sources, operators can see civilian aircraft, military aircraft, and other objects operating nearby in real time.

This broader view provides another layer of safety. The command system can also issue its own “votes” that prevent the laser from firing if protected aircraft or restricted airspace are nearby.

In practical terms, this means that if an operator accidentally points the system toward an area where protected aircraft are operating, the laser will not fire. The system automatically blocks the engagement.

It’s another example of the principle used widely in aviation: multiple independent safeguards working together to prevent unsafe conditions.

WHAT ACTUALLY HAPPENS WHEN A LASER FIRES?

Another common misconception is how the laser beam behaves once it leaves the system.

In movies, laser beams look like glowing bolts of light traveling across the sky. Real directed-energy systems don’t work that way.

The beam itself is invisible and travels at the speed of light. The system can turn the laser on and off extremely quickly — engaging or disengaging in fractions of a second as safety systems continuously monitor conditions.

People also often imagine that the beam continues indefinitely into space like a perfectly straight pencil.

In reality, the beam is shaped like an hourglass. The center of the hourglass is called the focus point. The focus point is set to a specific, controlled distance to concentrate energy on a target. Beyond that focus point, the beam naturally spreads, reducing in intensity by an order of magnitude a few hundred meters beyond the focus point.

This means that after the target area, the beam quickly loses the intensity needed to cause damage. The natural physics of the beam significantly limits the risk to aircraft far beyond the engagement area.

FAMILIAR TECHNOLOGY

It’s also important to remember that the core laser technology used in these systems is not exotic.

The same class of near-infrared fiber lasers used in directed-energy systems is widely deployed across industry. Variants of these lasers are used every day in manufacturing to cut and weld metals, in medicine to perform precise surgical procedures, and even in agriculture as an herbicide-free way to remove weeds.

What makes counter-drone systems different is not the laser itself, but the sophisticated sensors, targeting systems, and safety controls built around it.

A SAFER WAY TO COUNTER DRONE THREATS

The rapid growth of small drone threats has created a difficult challenge: how to stop dangerous aircraft without introducing new risks into already busy airspace. That challenge now affects airports, critical infrastructure, public events, and military installations alike.

Properly designed laser systems help solve that problem.

Taken together — automated safety checks, integrated airspace awareness, and the natural physics of the beam itself — these systems are designed to operate safely even in mixed civilian airspace.

In a crowded airspace, the safest way to stop a dangerous drone may ultimately be a precisely controlled beam of light.

ABOUT THE AUTHOR

Aaron Westman is an engineer and leader specializing in counter-UAS and directed energy systems. He has played a key role advancing mobile laser weapon integration and operational deployment, supporting a variety of cross-domain capabilities that improve precision engagement and layered air defense.

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