Countering Fibre Optic Uncrewed Aerial Systems is a March 2026 market engagement document issued by UK Defence Innovation (UKDI) on behalf of the UK Ministry of Defence (MOD), setting out the department’s interest in novel approaches to detecting and defeating fiber‑optically controlled uncrewed aerial systems (UAS). The document reflects operational lessons emerging from the war in Ukraine, where fiber‑optic‑tethered drones have demonstrated resilience against conventional radio‑frequency countermeasures.
The publication outlines MOD’s intent to explore technical and operational concepts capable of addressing this specific class of UAS, which are immune to electronic attack methods that rely on RF disruption. It frames the challenge as one requiring integration into a layered, open‑architecture counter‑UAS ecosystem, rather than a standalone solution, with an emphasis on adaptability to future adversary evolution.
Key themes addressed in the document include:
Operational Drivers and Threat Context
How the rapid evolution of UAS employment in Ukraine, particularly the use of fiber‑optic control links, has exposed gaps in existing counter‑UAS approaches and driven demand for alternative detection, tracking and defeat mechanisms.
Scope of the Market Engagement
Clarification of what MOD is seeking input on: novel or repurposed capabilities specifically focused on fibre‑optically controlled UAS, alongside industry perspectives on feasibility, viability and tactical utility.
System Integration and Architecture
The requirement for proposed solutions to integrate within a layered, open‑architecture framework, including compatibility with MOD data standards such as SAPIENT, and applicability to both fixed‑site protection and mobile, forward‑deployed users.
Post Image Credit: U.S. Army
