Chinese scientists say they have set a new visible-light transmission standard by demonstrating a laser-driven communication engine that uses a light-based, easy-to-use ceramic material capable of transmitting information over distances exceeding 1.2 kilometers.
“This is really a record with attractive performance beyond the traditional technology,” says Zhiguo Xia of South China University of Technology in Guangzhou, China.
The research team behind the potentially histpric achievment said exceeding current LED-based light-based transmission distances, which are typically confined to a few meters could usher in ‘intelligent’ 6G communication networks, including streetlamps, smartphones, and other devices that “would be able to ‘see,’ ‘hear,’ and ‘think,’” by detecting people and objects and integrating that information into network-wide active processing.
Laser-Powered Engines & the Elusive Future of AI-Driven Intelligent 6G Networks
According to a statement announcing the laser-powered engine breakthrough, conventional LED-based visible light communication (VLC) systems typically operate at short distances ranging from a few inches to “a few meters.” This has limited their applications to mostly laboratory demonstrations. Still, the technology is considered an integral part of planned intelligent, AI-enabled 6G networks that would replace current 5G standards.
Unlike current 5G networks, 6G networks would enable significantly more information and enable systems to act in concert to improve performance and add previously unavailable features. According to the study authors, 6G networks built into future smartphones and other electrically wired objects such as streetlamps and stoplights would not allow information to move through networks an order of magnitude faster. They note that this added capacity would fundamentally change these systems, turning them from single-use systems into connected components of a larger, intelligent network.
“They would be able to ‘see,’ ‘hear,’ and ‘think,’ detecting people and objects and their subtle movements,” the researchers explained.
Still, several technological barriers have limited the emergence of 6G, including what the research team described as “challenges in combining high-performance lighting materials and high-speed photodetectors into compact devices that can be mass-produced at low cost.”
“A Paradigm Shift from Connection to Intelligent Connection”
To extend the range of data transmission, Xia’s team explored ceramics capable of emitting light and withstanding high temperatures. The final process involved mixing calcium ions with a powder of chemical compounds typically used in glass formation.
According to the study authors, this simple formula “eliminates the need for high-pressure manufacturing,” typically associated with electronic ceramic production. The ceramic used in the process also transfers heat 20 times more efficiently than silicon, the favored material in laser-driven transmission technologies. This durability dramatically increases the amount of laser energy the material can withstand compared to other VLC options.
After experimenting with several prototypes, the team said that tests showed light coherence and data consistency up to 1.2 kilometers, offering “direct experimental evidence” for 6G technology.
Xia conceded that dreams of intelligent AI-enabled networks with this level of data transmission capability have so far existed “largely at the visionary level.” However, the team’s result could make “a paradigm shift from connection to intelligent connection possible.”
Team Eyeing Future Improvements to Increase Speed and Reliability
Although the initial experiments were encouraging, Xia’s team said their current version has some limitations. For example, it mainly emits light in the yellow region, ranging between 500 and 650 nanometers. This lack of red-light components would limit its use to what the team described as “applications requiring a very high color rendering index,” a measure of an object’s true color relative to a natural sunlight standard.
The new laser-powered engine also operates at what the team termed “far below” fiber-optic speeds, limiting its usefulness in intelligent network applications.
To address these and other limitations, Xia’s team said they plan to investigate light-emitting materials beyond ceramics. These include exploring materials with shorter fluorescence lifetimes and tunable emission bandwidths, which the team notes “can further speed up (transmission) rates.”
Another possible future improvement is to integrate the laser-driven engine with an RF (radio-frequency) system to ensure continued data transmission in bad weather, which can degrade VLC performance. Because future intelligent 6G networks will include satellites, the team said, adding that their technology could enable high-speed coverage in “tough-to-reach” regions of the planet, such as deserts, oceans, and mountains.
“AI‑driven link adaptation can dynamically adjust data rate and optical power, ultimately supporting a future 6G network that is space‑air‑ground integrated, fully covered, and highly reliable,” Xia explained, adding that their work “also provides compelling experimental support for the application of laser lighting in scenarios such as drone logistics and low‑altitude air travel.”
The study “Tailoring quasi-transparent ceramic as a laser-driven photonic engine for kilometer-level white light communication” was published in the journal Matter.
Christopher Plain is a Science Fiction and Fantasy novelist and Head Science Writer at The Debrief. Follow and connect with him on X, learn about his books at plainfiction.com, or email him directly at christopher@thedebrief.org.