Imagine downloading massive files, streaming multiple 8K videos, or transferring enormous amounts of data almost instantly without relying on traditional wired connections. What if the same technology could deliver extraordinary speeds through both optical fibre cables and wireless signals?
Scientists have taken an important step towards making this possible. Researchers led by Yunhao Zhang have developed an ultra-wideband communication system that can transmit data at speeds of 512 gigabits per second (Gbps) through optical fibre and 400 Gbps wirelessly using the same set of devices.
The breakthrough could help overcome one of the biggest challenges in modern telecommunications: connecting extremely fast fibre-optic networks with equally fast wireless communication systems.
The research introduces a new approach to combining optical and wireless technologies, potentially opening the door to faster 6G networks, wireless data centres and next-generation internet infrastructure.
The Problem With Today's Communication Networks
Modern communication networks depend heavily on two technologies: optical fibre and wireless transmission.
Optical fibre cables carry information using pulses of light. They can transfer enormous amounts of data over long distances with very little signal loss. This makes them essential for internet infrastructure, data centres and communication networks.
Wireless communication, on the other hand, uses electromagnetic waves to transfer information through the air. It allows smartphones, computers and other devices to communicate without physical cables.
Both technologies have improved dramatically, but connecting them efficiently remains a major challenge.
The problem is that fibre and wireless systems operate using different signal architectures and hardware. Fibre communication generally processes signals at baseband frequencies, while wireless systems often require signals to be converted into intermediate or much higher frequencies.
Moving extremely fast data signals between these two systems requires additional electronic components, frequency converters and signal-processing hardware.
These extra components increase system complexity, energy requirements and costs. They can also introduce noise and signal distortion, making it difficult to maintain extremely high data speeds.
As future networks move towards 6G and terahertz communication, these limitations could become even more serious.
A New System That Connects Fibre and Wireless Communication
To address this problem, Yunhao Zhang and his team developed an ultra-wideband (UWB) integrated photonics system.
The central idea is relatively simple: instead of building separate communication systems for fibre and wireless transmission, the researchers designed a shared-bandwidth infrastructure capable of supporting both.
This means the same set of devices can handle extremely fast data transmission through optical fibre and wireless links.
The system relies on two important processes:
Electro-optic (EO) conversion: Converts electrical signals into optical signals that can travel through fibre.
Opto-electronic (OE) conversion: Converts optical signals back into electrical signals for further processing or transmission.
The researchers developed two important photonic devices to perform these conversions.
The first is a thin-film lithium niobate (TFLN) modulator, which converts electrical information into optical signals.
The second is a modified uni-travelling-carrier photodiode (UTC-PD), which converts optical signals into high-frequency electrical signals.
Both devices offer operational bandwidths exceeding 250 GHz.
In simple terms, bandwidth determines how much information a communication system can handle at a time. A wider bandwidth generally allows more data to be transmitted at higher speeds.
By achieving such an exceptionally wide operating range, the researchers created a system capable of supporting more than 100 GHz of channel bandwidth across both fibre and wireless communication links.
512 Gbps Through Fibre and 400 Gbps Wirelessly
One of the most impressive achievements of this research is the data transmission speed.
Using the same photonic devices, the researchers demonstrated two extremely high-speed communication links.
OPTICAL FIBRE
512 Gbps
Single-lane transmission
WIRELESS
400 Gbps
Terahertz transmission
What does this mean?
These speeds demonstrate that the same integrated photonics infrastructure can support exceptionally fast communication across both wired and wireless environments.
The 512 Gbps fibre transmission demonstrates the system's ability to handle enormous amounts of information through optical connections.
Meanwhile, the 400 Gbps wireless transmission represents a particularly important milestone. According to the researchers, it is the first demonstration of wireless transmission at this data rate.
The achievement is especially significant because wireless systems generally face additional challenges, including signal attenuation, noise and distortions at extremely high frequencies.
The researchers also introduced an advanced artificial intelligence-inspired signal-processing technique called the complex bidirectional gated recurrent unit (complex-biGRU) algorithm.
This algorithm helps recover information from signals affected by complex distortions.
Unlike traditional linear signal-processing methods, which can struggle when signals become extremely wideband and experience nonlinear interference, the complex-biGRU approach can learn complicated signal patterns and correct distortions more effectively.
This helps maintain signal quality even when transmitting enormous amounts of data.
86 Channels of 8K Video Transmitted in Real Time
The researchers did not stop at demonstrating extremely high single-channel transmission speeds.
They also tested whether their technology could support high-density wireless communication, where multiple channels operate simultaneously.
For this demonstration, the team developed an all-optically assisted ultra-broadband wireless transmission scheme.
Using this approach, they successfully transmitted real-time 8K video across 86 separate wireless channels.
The channels covered a wide frequency range from 138 GHz to 223 GHz, with each channel using 1 GHz of bandwidth.
This demonstration highlights the potential of terahertz communication for supporting large numbers of connected devices and high-bandwidth applications simultaneously.
To understand its importance, consider a future environment where thousands of devices, sensors, computers and wireless systems need to exchange enormous amounts of information.
Traditional wireless networks could struggle to provide enough capacity for all these connections.
A system capable of operating across many high-frequency channels could help distribute this communication demand more efficiently.
It could also become useful for future wireless data centres, where enormous quantities of information must move between computing systems with minimal delays.
Why Terahertz Communication Matters for 6G
The next generation of wireless communication, commonly known as 6G, is expected to require much higher data rates, lower latency and significantly greater network capacity.
Terahertz (THz) frequencies could play an important role in achieving these goals.
Terahertz waves occupy a frequency region above approximately 0.1 THz. They offer access to extremely wide frequency bands, potentially allowing much more information to be transmitted than conventional wireless systems.
However, working at these frequencies is technically difficult.
Signals can weaken quickly over distance, and generating, transmitting and detecting them requires highly advanced hardware.
The new integrated photonics system addresses several of these challenges by using optical technology to generate and process high-frequency wireless signals.
Another important advantage is that the system does not require complicated electrical frequency-mixing arrangements traditionally used to connect fibre and wireless networks.
This can reduce hardware complexity, improve frequency conversion and potentially lower implementation costs.
Could This Technology Reach Speeds Above 10 Tbps?
The researchers believe their system has considerable room for improvement.
Although the demonstrated speeds are already impressive, the current transmission performance is partly limited by external testing equipment, including probes, amplifiers and antennas.
Improving these components could allow the system to achieve even higher data rates.
The researchers also suggest that combining several advanced communication techniques could potentially push terahertz transmission beyond 10 terabits per second (Tbps).
These techniques include:
Polarization multiplexing: Transmitting multiple independent signals using different polarization states.
Frequency-division multiplexing: Using multiple frequency bands to carry separate data streams.
Spatial multiplexing: Using multiple antennas to transmit and receive several data streams simultaneously.
Advanced signal coding: Improving how information is encoded to increase transmission efficiency.
The team also suggests that high-gain antennas, specialized lenses and cascaded terahertz amplifiers could extend wireless transmission distances to 1 kilometre or more.
These are potential future capabilities rather than distances and speeds demonstrated in the current experiment.
Beyond Faster Internet: Other Possible Applications
The technology could have applications far beyond conventional internet connections.
One promising area is wireless data centres. Modern data centres require enormous amounts of information to move between servers and computing units. Ultra-high-speed wireless links could potentially reduce dependence on physical connections in certain environments.
It could also support future 6G base stations, helping connect high-speed fibre infrastructure with wireless users.
Another interesting possibility is terahertz radar and sensing.
The same photonic technology could potentially be adapted for high-resolution radar systems, indoor positioning and real-time monitoring of vital signs.
It may also contribute to terahertz imaging and spectroscopy, which could be useful for industrial inspection, material analysis and biological research.
A Step Towards a Unified Communication Future
The research by Yunhao Zhang and his team demonstrates a promising way to overcome the traditional separation between optical fibre and wireless communication.
By combining ultra-wideband photonic devices with advanced signal processing, the researchers achieved 512 Gbps fibre transmission, 400 Gbps wireless transmission and real-time 8K video delivery across 86 wireless channels.
Although the technology still requires further development before widespread commercial deployment, it offers an important direction for future telecommunications.
Rather than treating fibre and wireless communication as two separate systems, this approach brings them closer together through a shared photonic infrastructure.
If further developed, it could help build communication networks that are faster, more scalable and capable of handling the enormous data demands of the 6G era.
In simple words: Scientists have developed a communication system that uses light-based technology to support extremely fast data transmission through both fibre cables and wireless signals. The system has demonstrated 512 Gbps through fibre and 400 Gbps wirelessly, bringing us one step closer to a future where wired and wireless networks work together seamlessly.
Reference: Zhang, Y., Shu, H., Guo, Y. et al. Integrated photonics enabling ultra-wideband fibre–wireless communication. Nature 651, 348–355 (2026). https://doi.org/10.1038/s41586-026-10172-9
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