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Published
20 October 2025
Written by Harry Forster
What if your AI model could run at the speed of light?
That’s the question behind the Hartley Ultrafast Processor, a new kind of co-processor that performs matrix-vector multiplication using light instead of electricity. The result is sub-10-nanosecond inference, without relying on memory fetches or clock cycles.
This isn’t just another AI accelerator. It’s a completely different architecture that sidesteps the limits of processors, GPUs, and even FPGAs by operating in the optical domain.
Why latency is the real problem
In many real-world systems, the challenge is not how many inferences per second you can make, but how fast you can make one. Whether you’re switching channels in a wireless network or reacting to sensor data in an industrial control loop, you often need a decision within nanoseconds.
Traditional digital AI platforms all hit the same wall — the von Neumann bottleneck between processor and memory. The Hartley Ultrafast processor bypasses that wall completely. There is no memory access, because the model weights are physically encoded into the system.
What makes this different
To prove the concept, Hartley built a prototype called Babbage, powered by optoelectronics. It looks mechanical, but it’s far from slow. The weights of the neural network are set by tiny motors that modulate light. Input data flows in as light intensity. The multiplication happens physically, in the time it takes light to pass through the system.
That’s the magic. The Hartley Ultrafast processor performs its computation without memory reads, without digital bottlenecks, and without delay. Inference time? Less than 10 nanoseconds.
Who it’s for
You won’t be soldering Babbage to your next PCB. This technology is designed as a chiplet-style co-processor, tightly integrated into existing compute platforms. It’s a specialist tool for engineers building the fastest systems on Earth.
Imagine:
- Real-time fusion control
- Next-generation security and defence electronics
- High-frequency financial trading
- Ultra-responsive wireless beamforming
- Nanosecond-scale sensor fusion
If your application is latency-bound, not bandwidth-bound, the Hartley Ultrafast processor might just be the hardware breakthrough you’ve been waiting for.
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