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推导出光链路C/N指标的简化计算式,并计算光接收模块改用砷化镓材料以后、光发射机改用砷化镓放大模块以后,光链路C/N指标和CTB指标的提高量。同时还说明光接收机内光接收模块下面的电放大模块实际上是电缆网络中的第一级放大器,在系统指标设计时不宜将它并入光链路。
The simplified calculation formula of optical link C / N index is deduced. After the optical receiver module is changed to gallium arsenide material, the optical link C / N index and CTB index are improved after the optical transmitter is changed to GaAs amplification module the amount. It also shows that the optical amplifier module below the optical receiver module is actually the first amplifier in the cable network. It should not be incorporated into the optical link when designing the system index.