How to Detect and Counter Fiber-Optic-Controlled Drones
New threats are emerging in the skies: fiber-optic-controlled drones. Controlled through ultra-thin fiber-optic cables, these drones are immune to conventional counter-UAS methods.
But they’re not fully immune either.
Ukrainian troops have already successfully found physical methods to fight back. Local engineers developed ‘smart barbed wire’ to snip the hair-thin fiber-optic cables on approach to server connectivity.
But that’s not the only means of protection. In reality, most defenders are using a three-step approach to tackle fiber-optic-controlled drones.
Implement Multisensor Detection
Most counter-drone systems use a combo of RF detection, radar, and optical sensors to flag incoming threats. But fiber-optic drones emit no control-link radio signals. So you need an alternative method.
Acoustic detection is one option. Distributed microphones can capture distinctive motor and propeller signatures. Extra signal-processing algorithms can help distinguish drone sounds from background noise. Ukraine, for instance, has already constructed several acoustic detection networks: Sky Fortress, FENEK and Zvook.
These systems have a common architecture:
- Low-cost directional microphones and/or parabolic collectors
- Local computers for noise classification
- Time-synchronized timestamps (often viaNTP/GPS)
- Compact detection messages (bearing, confidence, node ID, timestamp
This way, multiple detections are cross-checked to pinpoint the target and trigger an alert within seconds.
But acoustics alone doesn’t always provide high-fidelity detection. So many units, including in Ukraine, use extra analysis tools like radar and EO/IR to validate the patterns.
Combined sensor inputs can be effectively processed with AI algorithms to provide a fuller operational picture and fewer false positives.
Take Down with AI-Assisted Kinetic Systems
A sure-fire way to disarm a fiber-optic-controlled drone is to physically destroy the aircraft. But covering a sprawling perimeter makes this tricky.
That’s why defense units are infusing physical kinetic counter-UAS systems with digital capabilities like computer vision, automated target tracking, and fire-control software.
According to Ukraine’s Ministry of Defence, 10+ military units are now equipped with
an AI-powered turret developed through the Brave1 defence innovation cluster. The turret automatically detects drones, tracks their movement, and calculates their flight paths. Then an operator authorizes engagement. These machine gun turrets are also being placed around the capital, with more to be installed soon around the regions.
One such system is the Sky Sentinel — a .50-cal M2 Browning turret developed by Carmine Sky. It spins 360 degrees and locks onto a target while firing by calculating speed and trajectory. These turrets have already taken down at least 60 targets, according to reports, including the new generation of Shahed jet-powered strike drones.
Aim for Layered Air Defence
No single technology can reliably neutralize every fiber-optic drone because of their inherent shortcomings.
Acoustic sensors struggle with background noise. Optical systems depend on visibility. Physical barriers have limited coverage. Kinetic interceptors require accurate targeting.
That’s why global militaries are looking to build an integrated counter-UAS architecture.
In July 2026, the NATO Support and Procurement Agency established five framework contracts for modular counter-drone systems.
The proposed solutions integrate radar, acoustic, and optical sensors with electronic warfare and optional kinetic interceptors — all coordinated through a shared command-and-control platform. This layered approach can be highly effective against fiber-optic drones, as alt sensors can offer high-fidelity detection and transmit intel to activate physical countermeasures.
Another advantage is greater flexibility. Operators can choose which response to deploy, instead of relying on just one defensive modality.
The Future of Fiber-Optic Drone Defence Is Layered
Fiber-optic drones have exposed a major weakness in conventional EW-dependent air defence. But the latest Ukrainian deployments and NATO initiatives demonstrate that alternative countermeasures are already emerging.
The next step is bringing these technologies into a unified layer for a faster, more coordinated defence response.
That’s also the direction Bavovna is exploring for our decentralized command and monitoring station. Our goal is to connect distributed detection with intelligent coordination and complementary response capabilities to enable coordinated responses across contested airspace.
