Is there a detector for fibre-optic drones and how to spot one
09.11.2026
By Ptashka Drones Editorial Team
People often search for a fibre-optic drone detector, but a regular RF detector cannot see such a drone. The reason is simple: control and video travel over a cable, not a radio link, so there is no signal on air to receive. Below we explain what can really help spot a fibre-optic FPV drone and where the limits of each method lie.
Why an RF detector cannot see a fibre-optic drone
An RF detector receives radio signals. A fibre-optic drone sends commands and video as light pulses through a cable that unwinds from a spool. It has no video transmitter shining on air. The same applies to the Ptashka drone detector: it looks for analog video, so it will not show a fibre-optic drone. The signals it does see are covered in which frequencies FPV drones use.
What can detect such a drone
| Method | How it works | Limitations |
|---|---|---|
| RF detector | Receives radio signals | A fibre-optic drone does not emit, so it will not work |
| Acoustic sensor | Recognises the typical noise of motors and propellers | Wind, vehicles and explosions interfere. Short range: manufacturers claim 150–450 m |
| Observation | A person spots the drone by eye or ear | Depends on weather, terrain and attention |
| Reconnaissance drones | Search for drones in ambush and fibre on routes | Need an operator and time to survey |
| Fibre glint | Thin fibre glints in the sun along roads | Not always visible and does not show where the drone is now |
No method is a guarantee. That is why they are combined: several sources of information give a better chance of spotting a drone in time.
Why an RF detector is still needed
Radio drones have not gone away. A detector gives early warning about them and shows intercepted analog video. But it covers only part of the threats, so no alert does not mean the sky is clear.
What a unit should do
- Share out observation. Assign each person a sector of sky and road.
- Check the route before moving. Look for fibre and drones waiting on the verges. How such ambushes work is explained in fibre-optic FPV drone in an ambush.
- Have physical protection. EW has no effect on a cable, so at close range small arms and anti-drone net launchers remain.
How to combine detection and countermeasures is covered in RF detector, EW and physical protection against FPV.
Frequently asked questions
Is there a detector for fibre-optic drones?
An RF detector cannot see such a drone because it does not emit a radio signal. Acoustic sensors, observation and reconnaissance drones are used instead.
Does the Ptashka detector see fibre-optic drones?
No. The Ptashka detector looks for analog video, while a fibre-optic drone sends video over a cable.
Does EW work against a fibre-optic drone?
No. EW jams radio links, while such a drone's signal runs over a cable.
At what distance does an acoustic sensor hear an FPV drone?
Manufacturers claim about 150–450 m, but the real range depends on wind, terrain and background noise.
Need a detector or a net launcher for your unit? Contact us and we will answer your questions about the products.
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