除了多级光纤放大器(EDFA)使带宽减小，噪声增大，光纤的材料色散也是对WDM系统影响的重要因素。
Besides multistage EDFA making the bandwidth reduced and noise increased, the material dispersion of optical fibers is also an important factor to affect WDM systems.
电厂应用结果表明，改进后的放大器信号稳定，准确度高，线性测量及调整范围增大。
The results of application show that the signal of amplifier is steady and accurate after improving, and range of linear measurement and regulation is enlarged.
同时为了保证测量精度，采用偏置电流极低的运算放大器opa128，并且增大了反馈电阻，以增强对弱信号的响应。
An OPA128 operational amplifier with extreme low bias current and big gain is adopted for enhancing the response to weak signals.
同时指出，光纤拉曼放大器的饱和功率随泵浦功率的增大而减小，相对于后向泵浦方式，增益饱和更容易在前向泵浦方式下产生。
It is shown that the saturation power of FRAs decreases with the pump power, and gain saturation is easier to occur in the forward pump scheme than in the backward pump scheme.
同时指出，光纤拉曼放大器的饱和功率随泵浦功率的增大而减小，相对于后向泵浦方式，增益饱和更容易在前向泵浦方式下产生。
It is shown that the saturation power of FRAs decreases with the pump power, and gain saturation is easier to occur in the forward pump scheme than in the backward pump scheme.
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