25 Gbit/s无源光网络技术进展和实验研究

摘要

With the new service development of high-definition video and virtual reality and the requirement of transporting the fifth generation mobile fronthaul/backhaul signals,passive optical network (PON) is required to transmit signals above 10 Gbit/s.When the line rate is above 10 Gbit/s,chromatic dispersion and power budget are the main constraint factor of system performance.Development and difficulty of 25 Gbit/s PON were introduced.25 Gbit/s PON was studied in experiment using 25 Gbit/s EML laser with zero dispersion wavelength,25 Gbit/s APD and 10 Gbit/s APD.Experiment results show that 32 dBm optical power budget (N2 level in 10 Gbit/s symmetric EPON) was achieved when EML transmit optical power is +5 dBm and 25 Gbit/s APD is used without optical amplifier.%高清视频、虚拟现实等新业务的产生以及PON传输5G移动前传和回传信号的需求,要求PON能支持单波超过10 Gbit/s速率的传输.当线路速率超出10 Gbit/s时,色散和功率预算成为限制系统性能的主要因素.介绍了25 Gbit/s PON系统的研究进展和存在的问题,并对采用基于零色散附近的25 Gbit/s速率的EML、分别基于25 Gbit/s和10 Gbit/s速率的APD接收机进行了实验研究.实验结果表明,采用25 Gbit/s速率的APD,EML的发射光功率设置为+5 dBm,在没有光放大器的情况下,可以达到10 Gbit/s对称的吉比特无源光网络的32 dBm的N2级别的光功率预算.