Fiber-Optic Cables Are Europe's Newest Plumbers

Orange pilots AI-powered fiber sensing to detect underground water leaks across Europe's utility networks in real time

15 Apr 2026

Every year, European water networks bleed billions of liters through undetected pipe leaks. The fix, it turns out, might already be buried in the ground.

Orange has developed a system called Fiber Detection that converts existing fiber-optic cables into smart sensors capable of identifying underground water leaks in real time. Built alongside VIAVI and Lightsonic, the technology debuted at Mobile World Congress 2026 in February. The pitch to utilities is simple: use what's already there.

The mechanics are elegant. Light pulses travel through the fiber, and any physical vibration near the cable, including the acoustic signature of pressurized water escaping a cracked pipe, alters the signal in detectable ways. Lightsonic's AI algorithms do the sorting, stripping out the noise of traffic and footsteps to confirm and locate genuine leaks. Precision currently reaches within one meter along the cable and ten meters laterally.

The economics sharpen the case further. Conventional IoT leak detection demands hardware roughly every 100 meters, each unit battery-powered and requiring field maintenance. Fiber Detection connects once at the exchange. No new hardware, no maintenance runs, no digging just to install sensors.

Timing matters here. European utilities face tightening regulatory pressure to reduce water losses, with new EU frameworks demanding measurable leakage cuts across member states. Meeting those targets will require better tools than utilities currently have. If Fiber Detection proves out at operational scale, cities could effectively overlay their existing fiber networks with a water monitoring layer, gaining smart infrastructure without the cost or disruption of a new sensor rollout.

The future of leakage management may already be running beneath the streets.