Soliton microcombs have pushed wireless transmission to a record-breaking 112 Gbps at 560 GHz, a significant milestone for 6G technology. This achievement overcomes the limitations of conventional electronics beyond 350 GHz, paving the way for ultra-high-speed mobile backhaul and future 6G networks.
The Japanese research team's breakthrough involves integrating advanced photonics and high-order data modulation. By using optical microcombs, they achieved a 100 Gbps-class wireless transmission beyond 420 GHz, with a remarkable 112 Gbps data rate over a 560 GHz carrier wave. This technology can download multiple 4K movies in a fraction of a second, surpassing current experimental systems.
One of the key innovations is the direct bonding of an optical fiber to a silicon nitride microresonator, which miniaturizes the device, boosts power, and provides climate-proofing. The researchers also isolated two highly stable optical carrier signals and coded them using QPSK and 16QAM modulation formats, enabling higher data density.
While 560 GHz frequencies may not be accessible to smartphones soon, this technology is a game-changer for the hidden infrastructure of the internet. It has the potential to replace expensive fiber-optic cables with wireless terahertz beams, enabling telecom companies to transmit massive data loads through the air from tower to tower.
Looking ahead, the team aims to further suppress phase noise and design advanced antennas to increase output power and distance. This breakthrough not only accelerates the development of 6G networks but also raises questions about the future of wireless communication and the potential for even faster, more efficient data transmission.
