研究了动态密集波分复用(DWDM)光网络中直接调制-强度检测(IM-DD)系统中的交叉相位调制(XPM)和放大自发辐射(ASE)导致的动态噪声积累效应对高速光脉冲传输时的强度噪声影响, 修正目前IM-DD系统中传输代价Q参数的计算公式。通过仿真分析了动态网络环境下两种噪声积累对动态光路径接收端误码率(BER)的影响, 得出了XPM相位噪声与动态网络中光纤段长度、段数、波长信道间隔、链路ASE噪声等在内的链路参数之间的关系。对于动态光网络中链路的选择具有很好的参考价值。

Accumulated intensity noises are investigated and the noises are induced by cross-phase modulation (XPM) effect and amplified spontaneous emission (ASE) in dynamic intensity-modulation direct-detection (IM-DD) optical fiber links with multiple fiber segments. A reasonable correction for Q parameter while computing the transmission penalty considering higher order XPM effect is added in the expression of XPM induced degradation. The effect on bit error rate of dynamic lightpath link caused by the two noises is elicited through simulation analysis. The relation between XPM effect and the links’ structure parameters in dynamic network, including the length of fiber segments, wavelength spacing, amplified spontaneous emission noise from amplifiers, etc., are proposed theoretically and numerically, and it is very useful for dynamical link establishment.