25 Gbit/s无源光网络技术进展和实验研究

Development and experiment research of 25 Gbit/s passive optical network

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 d Bm,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 d Bm的N2级别的光功率预算。

With the new service development of high-definition video and virtual reality and the requirement of transporting the fifth generation mobile fronthaulfoackhaul 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.