Guangtongxin yanjiu (Feb 2024)
Experiment Research on 600 Gbit/s Communication System
Abstract
【Objective】The rapid development of data center networks necessitates intensive research into high-speed and high-capacity data center optical transmission systems. Single carrier 400 or 600 Gbit/s transmission will gradually become the mainstream transmission rate in the next generation of communication network. While the application of 400 Gbit/s transmission is well-studied in data center networks, detailed research on 600 Gbit/s transmission systems is less common.【Methods】This study is based on a single carrier 600 Gbit/s next-generation data center Elastic Optical Network (EON) transmission system, and conducts detailed theoretical analysis and experimental research on factors affecting transmission distance and spectrum utilization efficiency.【Results】The analysis shows that the maximum transmission distance is determined by the single carrier's peak input optical power, while the spectrum utilization efficiency is related to the bandwidth of the transmission channel. Experimental investigation is conducted on a single carrier 600 Gbit/s EON transmission system. By comparing the relationships between different fiber input optical powers, the system’s Q factor and the pre correction bit error rate, as well as the relationships between 3 dB channel filtering bandwidth and system’s Q factor for different channel numbers, it is confirmed that the system’s transmission distance and spectrum utilization efficiency are related to the optimal fiber input optical power and filtering bandwidth, respectively. Furthermore, the experiment shows that the optimal single-wave input optical power and optimal filtering bandwidth of the 600 Gbit/s transmission system are + 4 dBm and 77 GHz, respectively. Under these settings, the system achieves the longest transmission distance and the highest spectral efficiency. Under these experimental conditions, the 600 Gbit/s transmission system achieves long-term stable operation without error for 48 hours, indicating that this fiber input power and bandwidth can effectively extend and improve the transmission distance and spectrum utilization of the 600 Gbit/s communication system.【Conclusion】The 600 Gbit/s EON system has an optimal input power and filter bandwidth that maximizes bandwidth utilization and transmission distance without significant fiber nonlinear effects or channel interference. The findings have significant values for the engineering construction of 600 Gbit/s transmission systems.
