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理论分析了光网络中大功率带间串扰攻击的产生机理,得出了攻击信号功率和光纤非线性折射率系数是大功率带间串扰攻击对用户信号质量产生破坏影响的主要因素。在VPI中搭建仿真实验系统,以误码率为信号质量评价指标,研究了大功率带间串扰攻击对用户信号质量的攻击影响及其攻击传播能力。结果表明,大功率带间串扰攻击会造成和攻击信号使用同一条光纤进行传输的用户信号质量劣化。攻击信号功率越高,信道间隔距攻击信号越近,光纤非线性折射率系数越大,用户信号受攻击影响越严重。大功率带间串扰攻击具有一定的攻击传播能力,当攻击信号功率高于用户信号功率27 dB时,攻击信号的攻击影响可传播至第四个光交叉连接器。
The mechanism of crosstalk attack between high-power bands in optical networks is analyzed theoretically. It is concluded that attack signal power and fiber nonlinear refractive index coefficient are the main factors that affect the quality of user signal caused by crosstalk attacks between high-power bands. The simulation experiment system is set up in VPI, and the bit error rate is used as the signal quality evaluation index to study the impact of high-power crosstalk attacks on user signal quality and its attack propagation ability. The results show that high-power inter-band crosstalk attacks can result in degraded user signal quality when used with the same fiber as the attack signal. The higher the attack signal power is, the closer the channel spacing is from the attack signal. The larger the fiber nonlinear refractive index coefficient is, the more serious the user signal is affected by the attack. High-power inter-band crosstalk attacks have a certain attack propagation capability. When the attack signal power is higher than the user signal power of 27 dB, attack effects of attack signals can propagate to the fourth optical cross-connect.