TITAN researchers Hossien Eldeeb, Isaac Osahon, Sina Babadi, Othman Younus, and Mohamad Ghaddar from the University of Cambridge have hit a critical milestone by engineering the first successful optical transmission…
TITAN researchers Hossien Eldeeb, Isaac Osahon, Sina Babadi, Othman Younus, and Mohamad Ghaddar from the University of Cambridge have hit a critical milestone by engineering the first successful optical transmission of binary data from Cambridge University Library, one of the world’s oldest academic libraries, directly to the Cambridge Engineering building.
The researchers sent digital light pulses, binary ones and zeroes, hurtling through open air at speeds approaching 6 Gbps, thanks to a pioneering Free-Space Optical (FSO) communication system.
While much of the world’s attention remains fixed on fibre optics and 5G, this demonstration highlights the untapped potential of FSO, especially for infrastructure-light and high-performance applications.
This achievement is a glimpse into a future where urban buildings can be linked with high-speed data pipes without the need to dig trenches or lay fibre, remote and rural communities can gain high-speed internet without waiting years for infrastructure, emergency and disaster zones can restore communications quickly, securely, and wirelessly, and military and tactical operations can rely on low-latency, high-throughput comms in the field.
At the heart of this trial lay a custom-designed FSO system, an integration of high-bandwidth blue lasers developed by KSLD and OSRAM (both of which were tested separately), precision receivers, and advanced optical engineering. By shaping and focusing the light beam using novel optics, the researchers achieved an efficient collimated beam — a stable and long-range connection with astonishing data throughput.
The tests have already shown data rates exceeding 6 Gbps under optimal conditions, all while maintaining Bit Error Rate (BER) below the Forward Error Correction (FEC) limit. With the low error rates, it is a feat that pushes the frontier of what is possible in outdoor optical communications.
With growing demands for secure, rapid data transfer and increased resilience in communications, systems like the one created by the TITAN researchers offer a highly adaptable solution.
TITAN would like to acknowledge the help of Sean Whelan (Safety Manager), Adrian Wonfor, and the University Library team, led by Steve Matthews, Tom Martin, and Craig Laurence to make this trial possible.
TITAN is part of the Federated Telecoms Hubs (FTH) alongside CHEDDAR, HASC, and JOINER. Together, we conduct world-leading R&D and create a new knowledge-sharing framework, roadmap technology, develop skills, and engage with standards while instilling a commercialisation-focused mindset across academia.
If you have any questions about the research discussed in this article, please contact titan-enquiries@eng.cam.ac.uk.
