600 Gbit/s速率传输系统的实验研究

The Experiment Research on 600 Gbit/s Communication System

【目的】由于数据中心网络的高速发展,对高速率、大容量数据中心光传输系统的性能研究也极为迫切,单载波400或600 Gbit/s传输将逐渐成为下一代通信网络主流的传输速率,当前人们对400 Gbit/s传输系统在数据中心网络中应用的研究较为广泛,而对600 Gbit/s传输系统的详细研究较少。【方法】为了满足数据中心通信容量日益增长的需求,文章基于单载波600 Gbit/s速率下一代数据中心弹性光网络(EON)传输系统,对影响传输系统的传输距离和频谱利用效率问题进行了详细的理论分析和实验研究。【结果】分析表明,单载波最大入纤光功率决定传输系统的最大传输距离,而传输系统的频谱利用效率与传输通道带宽有关,同时对单载波600 Gbit/s EON传输系统进行实验研究,实验通过对比不同入纤光功率与系统Q因子和纠前误码率的关系,以及不同通道数3 dB通道滤波带宽与系统Q因子的关系,证实系统传输距离和频谱利用效率分别与最佳入纤光功率和滤波带宽有关,并且实验表明,600 Gbit/s传输系统最佳单波入纤光功率和最佳滤波带宽分别为+4 dBm和77 GHz,此时系统传输距离最远,频谱利用效率最高。并且在此实验数据下实现了600 Gbit/s传输系统48 h无误码长期稳定运行,这说明该入纤光功率和带宽可有效延长和提高600 Gbit/s通信系统的传输距离和频谱利用率。【结论】对于600 Gbit/s速率EON传输系统存在一个最佳入纤功率和滤波带宽,使得系统在不引起明显光纤非线性代价和通道串扰情况下传输距离最远,带宽利用率最大,文章提出的600 Gbit/s传输系统最佳入纤光功率和滤波带宽对600 Gbit/s传输系统的工程建设具有非常有意义的参考作用。

【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 demand for communication capacity in data centers,there is extensive research on the application of 400 Gbit/s transmission systems 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 fiber 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,respectively.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 transmission distance and the highest spectral efficiency.In the experimental demonstration,the 600 Gbit/s transmission system has achieved 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.