[Objective]Due to the rapid development of data center networks,research on the performance of high-speed and high-capacity data center optical transmission systems is extremely urgent.Single carrier 400 or 600 Gbit/s transmission will gradually become the mainstream transmission rate in the next generation communication network.To meet the growing de-mand for communication capacity in data centers,there is extensive research on the application of 400 Gbit/s transmission sys-tems in data center networks,while there is less detailed research on 600 Gbit/s transmission systems.[Methods]The article 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 the issues that affect the transmission distance and spectrum utilization efficiency of the transmission system.[Results]The analysis shows that the maximum fiber input optical power of a single carrier determines the maximum transmission distance of the transmission system,and the spectrum utilization efficiency of the transmission system is related to the bandwidth of the transmission channel,At the same time,experimental research was conducted on a single carrier 600 Gbit/s EON transmission system.By comparing the relationship among the different fi-ber input optical power,the system Q factor and the pre correction error rate,as well as the relationship between different channel numbers of 3 dB channel filtering bandwidth and system Q factor,it was confirmed that the transmission distance and spectrum utilization efficiency of the system are related to the optimal fiber input optical power and filtering bandwidth,respec-tively.The experimental results have shown 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.At this time,the system has the longest transmis-sion distance and the highest spectral efficiency.In the experimental demonstration,the 600 Gbit/s transmission system has a-chieved long-term stable operation without error for 48 h,indicating that the fiber input power and bandwidth can effectively extend and improve the transmission distance and spectrum utilization of the 600 Gbit/s communication system.[Conclusion]For the 600 Gbit/s rate elastic optical network transmission system,there exists an optimal fiber input power and filtering bandwidth,which maximizes the bandwidth utilization at the longest transmission distance without causing significant fiber nonlinear costs and channel crosstalk.The optimal fiber input optical power and filtering bandwidth proposed in this paper have significant reference value for the engineering construction of the 600 Gbit/s transmission system.
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