In 2014, a U.S. Navy sailor sitting at a video game-style controller in the Persian Gulf pointed a laser at a small drone and destroyed it. No missile. No bullet. Just focused light. That moment, aboard the USS Ponce, marked the first time the AN/SEQ-3 Laser Weapon System (LaWS) was deployed operationally on a warship, and it quietly changed what naval defense could look like. If you've ever wanted a clear explanation of what LaWS actually was, how it worked, what it proved, and where the technology went afterward, this post covers all of it.
What Is the AN/SEQ-3 Laser Weapon System?
The AN/SEQ-3 Laser Weapon System, also known as LaWS or the XN-1, is a shipboard directed-energy weapon developed by the U.S. Navy to counter what the military calls "asymmetric threats." That's a broad term, but in this context it means things like small fast-attack boats, unmanned aerial vehicles (drones), and low-flying aircraft. The kind of threats that are cheap for adversaries to field but expensive and difficult to counter with traditional missiles and guns.
Development began in March 2007, led by the Naval Surface Warfare Center (NSWC) Dahlgren, working with universities and private defense firms. In 2010, Kratos Defense & Security Solutions was awarded an $11 million contract to support the program. All told, the Navy spent roughly $40 million on research, development, and testing before the system was declared operational in 2014. By any measure, that's an unusually modest price tag for a weapons system of this significance.
How Does LaWS Actually Work?
Here's where it gets interesting. Rather than using a single powerful laser emitter, LaWS is essentially six commercial fiber welding lasers bundled together. They don't merge into one beam, but all six converge on the same point on a target simultaneously. The result is a concentrated infrared beam capable of generating around 30 kilowatts of power during field operations.
The system runs off a diesel generator, separate from the ship's main electrical supply, with a power conversion efficiency of about 35 percent. Targeting is handled through integration with the Phalanx CIWS (Close-In Weapon System) radar, which hands off tracking data to the laser's own fire control system. A single surface warfare weapons officer can operate the entire system from one console, managing power levels and firing decisions with a joystick-style controller.
One of its most practical design features is scalable power output. At low power, the laser can dazzle and disorient a sensor or a person's eyes non-lethally. At higher power, it can fry motors, burn through hulls, and detonate explosive materials. That flexibility is what makes it genuinely useful in a maritime environment where the rules of engagement can shift quickly from "warn" to "destroy."
LaWS can shoot down a small drone in as little as two seconds, and each shot costs approximately 59 cents. Compare that to a missile costing hundreds of thousands of dollars.
What Could LaWS Actually Do in Testing?
The Navy has released video footage from testing showing LaWS doing three things: shooting a ScanEagle UAV out of the sky, detonating a rocket-propelled grenade, and burning out the engine of a rigid hull inflatable boat (RHIB). Officials described the results as exceeding expectations. Against small UAVs, the system could achieve target destruction in roughly two seconds of sustained beam contact.
Against small boats, the tactic was to target the engine, disable it in a few seconds of lasing, then move on to the next boat. In a scenario like a swarming small-boat attack, which has long been cited as a serious threat in the Persian Gulf, that kind of rapid sequential engagement is exactly what the Navy needed. What it couldn't do at 30 kW was threaten credible anti-ship missiles or aircraft flying at serious altitude, though those were never the intended targets.
The optics built into the LaWS system also doubled as a surveillance tool. Sailors on the Ponce reportedly compared its long-range observation capability to having the Hubble Space Telescope at sea. That ISR (intelligence, surveillance, and reconnaissance) function wasn't incidental. It added real operational value beyond the weapon itself.
The USS Ponce Deployment (2014–2017)
LaWS was installed on the USS Ponce in August 2014 and deployed to the Persian Gulf with the U.S. 5th Fleet. The decision to use the Ponce, an older amphibious ship operating as an afloat forward staging base, was deliberate. It had the deck space, the power connections, and the strategic location to serve as a real-world test environment. The Persian Gulf presented exactly the harsh conditions the Navy needed to evaluate: heat, humidity, dust, and salt water.
In September 2014, the system was declared an operational asset. That was a significant step. It meant the ship's commander was officially authorized to use LaWS for self-defense if a real threat emerged. By December 2014, the Office of Naval Research announced that LaWS had worked "seamlessly with existing ship defense systems" and performed effectively against the threats it was designed to counter.
The Ponce remained in the Persian Gulf until September 2017, when it was relieved by a replacement vessel and subsequently decommissioned. LaWS was removed from the ship at that point. It was later refurbished and repurposed as a land-based test asset to support the development of next-generation systems.
Why Didn't the AN/SEQ-3 Go Into Mass Production?
This is the question most people land on, and the answer is more nuanced than "it didn't work." LaWS had a handful of specific technical problems that made scaling it impractical. First, it used bulky trickle-charge capacitors with a long charge time. Second, the six separate laser emitters struggled to stay synchronized, which created coherence problems in the combined beam. Third, tracking small fast-moving targets, especially agile drones, was genuinely difficult.
There was also an infrastructure problem. Fitting the system onto modern combatants like Arleigh Burke-class destroyers required solving for space, available power, and cooling requirements. Those ships are already stretched thin, particularly the Flight III variants that are powering the new AN/SPY-6 air and missile defense radar. Finding headroom for a laser and its associated power skid wasn't trivial.
| Parameter | Value / Detail |
|---|---|
| Designation | AN/SEQ-3 (XN-1 LaWS) |
| Power output (operational) | ~30 kW |
| Power output (maximum tested) | Up to 100 kW during trials |
| Laser type | Solid-state fiber laser array (6 emitters) |
| Cost per shot | ~$0.59 |
| Target types | UAVs, small boats, RPGs, low-flying aircraft |
| Guidance | Phalanx CIWS radar handoff |
| Deployed ship | USS Ponce (AFSB[I]-15), Persian Gulf, 2014–2017 |
| Program cost | ~$40 million total R&D |
None of this means LaWS was a failure by any honest measure. It was always a developmental prototype, not a production weapon. Its job was to validate the core concepts of shipboard directed-energy weapons in a real operational environment. By that standard, it succeeded. The Navy got three years of field data in the Persian Gulf, identified exactly what needed to be fixed, and used those findings to design better systems.
What Came After LaWS: HELIOS and the Path Forward
In January 2018, the Navy awarded a $150 million contract to Lockheed Martin for the development of HELIOS, the High Energy Laser with Integrated Optical-dazzler and Surveillance. HELIOS operates at 60 kW, with growth potential up to 150 kW, and is integrated directly into the Aegis combat system on Arleigh Burke-class destroyers. It's a materially different level of capability compared to LaWS.
The first HELIOS system was delivered to the Navy in August 2022 and installed on USS Preble (DDG-88). Testing has included successful engagements against UAV targets. The system also incorporates an optical dazzler mode for disabling enemy sensors without destroying the target outright, plus a long-range surveillance camera function that builds on the ISR capability first demonstrated by LaWS.
LaWS didn't fail. It did exactly what a developmental prototype is supposed to do: it proved the concept, found the limits, and handed the baton to something better.
As of 2025, the Navy has expressed cautious optimism about HELIOS but hasn't committed to fleet-wide deployment yet. Admiral James Kilby, acting Chief of Naval Operations, told reporters at the Sea-Air-Space expo that he wants directed-energy weapons to develop further before making large-scale procurement decisions. That's a realistic position given the genuine power-generation challenges that remain on current surface combatants.
Why LaWS Still Matters in 2026
The AN/SEQ-3 Laser Weapon System matters because it was the proof. Before LaWS, shipboard high-energy lasers existed in labs and test ranges. After LaWS, the Navy had three years of real-world data from an operationally declared, combat-authorized weapon in the Persian Gulf. That distinction is enormous when you're trying to convince budget committees and procurement offices to invest in an entirely new weapons category.
It also established several principles that now define the entire directed-energy weapons conversation in the U.S. military. Low cost-per-shot. Scalable lethality. Near-unlimited magazine depth. Complementing rather than replacing traditional kinetic systems. These concepts weren't invented by LaWS, but LaWS gave them operational credibility.
If you're studying naval warfare, defense procurement, or the trajectory of directed-energy weapons, the AN/SEQ-3 is the reference point you keep coming back to. Every system that comes after it, from HELIOS on a Burke destroyer to Israel's Iron Beam to the UK's DragonFire, is working through questions that LaWS first forced into the open. How do you power a high-energy laser on a ship that's already stretched? How do you track small fast-moving targets reliably? How do you maintain beam coherence in salt air and humidity? LaWS didn't fully solve those problems. But it made them concrete, and that matters.
The Bottom Line
The AN/SEQ-3 Laser Weapon System was a 30-kilowatt solid-state laser deployed on the USS Ponce from 2014 to 2017. It could destroy small drones in two seconds, disable boat engines, and do it all for about 59 cents per shot. It never went into mass production because of coherence, tracking, and power infrastructure problems. But it proved that shipboard directed-energy weapons could work in the real world, under real conditions, authorized for actual combat use. That validation is the foundation everything else is built on.
If this post gave you a clearer picture of what LaWS actually was, you might also want to dig into how HELIOS compares technically, or how the Navy's broader directed-energy roadmap is shaping surface warfare doctrine for the 2030s. Those threads pull directly from what LaWS started. Check out related posts on this site, or drop a question in the comments if there's a specific aspect of shipboard laser systems you want covered in more depth.
