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频率失谐对掺镱光纤放大器中光脉冲传输特性的影响

, PP. 122-126

Keywords: 光通信,传输特性,分步傅里叶变换法,光脉冲,掺镱光纤放大器,频率失谐

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Abstract:

为了研究光脉冲在掺镱光纤放大器中的放大传输特性,建立了光脉冲在分布式光纤放大器中的传输方程,采用分步傅里叶变换法数值模拟了光脉冲的传输状态,并着重讨论了频率失谐对光脉冲特性的影响。结果表明对于掺镱光纤放大器,在介质的色散长度远远小于非线性长度时,随着在放大器中的传输,光脉冲在放大的同时被展宽,脉冲中心出现峰值,其频谱加宽;当出现频率失谐时,光脉冲放大能力减弱,脉冲失去对称性,并且窄化。若光脉冲中心频率沿不同的方向偏离介质增益峰值频率,脉冲变形规律不同。因此在设计放大系统时应该考虑光纤放大器的色散以及频率失谐对其传输特性的影响。

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