welcome to plessey

Engineering
the future in light

Technologies shaped by light.
We design and build two photonic technologies – integrated under one roof, engineered to work together.

microleds

Smaller, brighter, sharper, more efficient.

The visual interface for AR, MR and next-era wearables. Our MicroLED technology delivers unprecedented pixel density and energy efficiency. Designed for people, ready to scale.

optical interconnects

Replacing electrical signals with light

Higher data rates. Lower latency. Far less energy. Built for the growing demands of AI infrastructure, optical interconnects move data between chips, cards and racks more efficiently than conventional electrical connections.

Together, these technologies form the hardware foundation for AI and next-era computing.

Explore our technology

Total process.
One operation.

Only Plessey combines research, IP, materials, processes and manufacturing in one integrated operation. By controlling every step – from source to signal – we shorten development cycles and strengthen every stage.

Deep know-how

70+ years of innovation. We’ve built our expertise through decades of research, development and manufacturing in photonics and semiconductor technologies.

Broad capability

Research to volume production. Our integrated facility enables rapid iteration from laboratory breakthrough to scaled manufacturing – without handoffs, delays or compromised specifications.

Single facility

Plymouth, UK – every stage connected. When research, process engineering and production occupy the same building, problems get solved faster and products reach market sooner.

About Plessey

Independent spirit. Serious intent.

We don’t follow familiar paths—we set new ones. Tested, proven, scaled.

When the world’s largest technology companies need breakthroughs in optical technologies, they come to us. Not noise, not hype – just capability, trusted and relied on.

Seventy years of invention – still moving forward.