In a potentially promising breakthrough, researchers from Osaka University and IMRA America have unveiled a single-channel optical wireless link that can achieve speeds of up to 240GB/s, a new world record. The team is now aiming to quadruple this performance to reach his unprecedented 1TB/s.
eeNews Europe reports that researchers have used stimulated Brillouin scattering lasers to generate a 300GHz signal for 6G networks. This laser uses the interaction between sound and light waves to generate a precise signal.
The team then established a 300GHz wireless communication system that utilizes this laser-based signal generator as both a transmitter and a receiver.
World’s highest transmission speed
The sub-terahertz band, ranging from 100 GHz to 300 GHz, is where these 6G transmitters and receivers shine. To further increase the data transmission speed of these wireless links, the researchers used an advanced approach called “multilevel signal modulation.” However, this method becomes very sensitive to noise when operating at the upper limits of these frequencies.
To function efficiently, multilevel signal modulation relies on an accurate reference signal. When these signals begin to shift, phase noise negatively impacts the performance of multilevel signal modulation. To combat this, the system uses online digital signal processing (DSP) to demodulate the signal at the receiver and increase the data rate.
Project leader Tadao Nagatsuma proudly announced, “Our team has achieved a single-channel transmission speed of 240GB/s. This is the world’s highest transmission speed using online DSP.”
By using multiplexing techniques that allow the use of multiple channels and more sensitive receivers, researchers hope to push data speeds to 1TB/s, preparing the next generation of 6G mobile networks. I am optimistic that we can do this. .
