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.
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。
The noise is reduced clearly by using fuzzy identify method, acoustic insulating material and orienting the noise source accurately.
运用模糊识别的方法，精确定位噪音源；采用消音材料、装置等显著降低各类噪音。
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