随着无中继光纤传输系统的广泛应用, 其复杂度与成本成为需要考虑的因素。提出了一种简化的无中继传输系统, 采用斯托克斯矢量-直接检测(SV-DD)代替相干接收机。仿真研究了单波与三波复用情况下的128 Gb/s 16QAM信号传输系统性能。仿真结果表明: 该系统能够很好地将信号解调出来, 前向与后向喇曼泵浦在功率为0.6 W和0.8 W情况下性能较好, 能够承受约400 ps·nm-1的残余色散。

With the wide application of repeatless optical fiber transmission system, its complexity and cost become factors to be considered. A simplified transmission system without relay is proposed, in which Stokes vector direct detection(SV-DD) is used instead of coherent receiver. The performance of 128 Gb/s 16QAM signal transmission system with single wave and three wave multiplexing is simulated. The simulation results show that the system can demodulate the signal well, and the performance of forward and backward Raman pump is better when the power is 0.6 W and 0.8 W, and it can withstand the residual dispersion of about 400 ps · nm-1.