提出了一种新的分级光功率均衡的方法以及节点隔离原则 ,分析了该方法对系统接收机Q值的影响。结果表明 ,当复用段光功率水平整体波动时 ,选择合适的复用段级均衡实现方式 ,可以维持与仅用通道级均衡基本相同的性能 ,同时简化了调节过程 ,降低了对通道级均衡单元的要求 A new hierarchical optical power equalization method and node isolation principle are proposed. The influence of this method on the Q value of the system receiver is analyzed. The results show that when the optical power level of the multiplex section fluctuates as a whole, choosing the proper equalization of the multiplex section can achieve the same performance as that of using only the channel-level equalization. At the same time, the adjustment process is simplified and the channel-level equalization is reduced Unit requirements