调制不稳定性对级联放大光纤传输系统信噪比的影响 |
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引用本文: | 宋开.调制不稳定性对级联放大光纤传输系统信噪比的影响[J].光学学报,1998,18(7):81-885. |
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作者姓名: | 宋开 |
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作者单位: | 清华大学电子工程系光纤通信研究所 |
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基金项目: | 国家科委863高科技,博士后科学基金 |
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摘 要: | 在考虑光纤损耗和级联放大器的情况下,推导了调制不稳定性的产生条件和增益的普适解析表达式,分析了调制不稳定性对信噪比的影响,给出了一个新的计算信噪比的表达式。
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关 键 词: | 调制不稳定性 光纤通信 信噪比 级联放大器 |
收稿时间: | 1997/6/15 |
Analysis of SNR Degradation Due to Modulation Instability in Optical Fiber Transmission System with Amplifiers |
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Abstract: | Modulation instability (MI) and consequent signal-to-noise-ratio (SNR) degradation in optical fiber transmission system with cascaded optical amplifiers are analyzed. Expressions for evaluating MI gain and SNR are derived. For a long distance transmission system, MI may degrade SNR significantly even at relatively low signal power. |
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Keywords: | ? modulation instability optical fiber communication signal to noise ratio |
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