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对ＷＤＭ光纤传输系统中ＥＤＦＡ的增益谱特性的研究表明：在饱和工作状态下，多个信道同时输入时各信道的增益低于相同总输入功率的单个信道的增益，且增益谱宽变窄，增益谱峰值随饱和程度的加深向长波长方向偏移。
The research on gain spectrum characteristics of EDFA in WDM optical fiber transmission system shows that the gain of each channel is lower than the gain of a single channel of the same total input power when the multiple channels are input simultaneously and the gain spectrum width becomes narrower, The peak of the gain spectrum shifts to the longer wavelength with the deepening of saturation.