Advances in Beyond 100 Gbit/s Fiber-Wireless Integrated Transmission Technology.

The deep integration of optical fiber communications and high-capacity high-frequency wireless communications is the core technology base of future The 6th Generation Networks(6G). It holds significant importance in building typical 6G scenarios such as "immersive communications, ubiquitous connectivity, and communications Artificial Intelligence (AI) integration". This paper introduces mainstream technologies and their implementation for optimizing the architecture and improving the spectral efficiency of fiber-wireless integrated transmission systems. We summarize some of the progress made by our team in these areas. First of all, facing the large-capacity demand for a new generation of immersive communications, we propose a novel architecture for seamless "fiber-wireless-fiber" integrated transmission system with the use of commercial Digital Coherent Optics(DCO). We firstly realize the photonics-assisted 100/200/400 GbE real-time THz wireless transmission, achieving a maximum line rate of 2X240. 558 Gbit/s. Secondly, for application scenarios with wide coverage and flexible deployment, Digital Sub Carrier Multiplexing (DSCM) technology was introduced into the optical fiber wireless converged access system. Our team designs and constructs a coherent Passive Optical Networks (PON) that supports up to 32 channel of fixed broadband access and 32 channel of W-band millimeter-wave wireless access. This coherent PON can reach the rate of 100 Gbit/s and is capable of flexible rate adjustments, facilitating subsequent iterative upgrades. Finally, in response to the demand for communication AI integration, our team proposes a likelihood-aware Vector-Quantization (VQ) Variational Auto Encoder (VAE) based on AI technology for end-to-end optimization of fiber-wireless integrated communication systems. Without the need for tera-hertz power amplifiers, we successfully demonstrate the wireless transmission of Dual-Polarization (DP) terahertz signal at a net rate of 366. 4 Gbit/s over 6.5 m 2 X 2 Multiple Input Multiple Output (MIMO) wireless link and 20 km Standard Single Mode Fiber (SSMF) link. The aforementioned technologies exhibit tremendous potential in typical future 6G scenarios. Besides, we briefly introduce our work in these areas, and provide an outlook on beyond 100 Gbit/s fiber-wireless integrated transmission technology from the perspectives of high capacity, long distance, integration and intelligentization. [ABSTRACT FROM AUTHOR]