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利用守恒量扰动法，研究了暗孤子分布放大传输系统中非线性增益随机变化对暗孤子脉冲到达检测窗口时间抖动，传输系统误码率的影响。结果表明：非线性增益随机变化对暗孤子速度产生了影响，与放大器噪声联合作用增大了暗孤子脉冲到达时间的抖动，恶化了系统的误码率，限制了系统的传输距离，削弱了非线性增益对暗孤子到达时间的抖动抑制作用。
The influence of random variation of nonlinear gain in dark soliton distributed amplification transmission system on time jitter and transmission system bit error rate of dark soliton pulse arrival detection window is studied by using the method of conservative quantity perturbation. The results show that the random gain of nonlinear gain has an impact on the speed of dark soliton, and the combined effect of noise and amplifier increases the dithering time of dark soliton pulse, degrading the system error rate, limiting the transmission distance of the system and weakening the non- Jitter Suppression Effect of Linear Gain on Dark Soliton Arrival Time.