非线性传输对光节点引入的串扰的影响

The Interplay Between Nonlinear Propagation and Crosstalk Induced by Optical Network Node

利用软件首次模拟了光纤的非线性传输对串扰的影响 ,发现光纤的非线性传输在很大程度上加大了串扰对系统的影响 ;由于自相位调制引起的调制不稳定性 ,主信号和串扰完全同频时的误码并不是最坏情况 ;相反地 ,主信号和串扰有一定频差时误码比较大 .模拟结果表明 ,在设计长距离光传送网时 ,应尽量保持光节点引入的串扰量小于 4 0 d

The simulation of the interplay between crosstalk and nonlinear propagation using software is presented. The result shows that the interplay between crosstalk and nonlinear propagation will decrease the performance of the optical transport networks. Because of the MI induced by SPM, the BER is not the worst case when the crosstalk and the main signal have the same frequency; on the other hand, BER is worse for the case that the crosstalk and the main signal have different frequency. The simulation result also shows that we should keep crosstalk induced by optical network node bellow 40 dB for a long distance transmission optical network.