80 Gbit/s Nyquist-DWDM 系统在大气流中的传输特性
Silun Du1, Qiaochu Yang1, Tuo Chen2
1The National and Local Joint Engineering Research Center of Space Optoelectronics Technology, Changchun University of Science and Technology, Changchun 130022, China.
Sensors (Basel, Switzerland)
|December 31, 2025
概括
这项研究表明,尼奎斯特密度波长分割多重复合 (Nyquist-DWDM) 系统可以通过大气流传输80 Gbit/s. 尼奎斯特脉冲塑造有效地减少了流效应,使强大的自由空间光通信成为可能.
科学领域:
- 光学通信是指光学通信.
- 自由空间光学自由空间光学
- 信号处理 信号处理
背景情况:
- 密集波长分割多重复合 (DWDM) 对于高容量光学网络至关重要.
- 大气动荡对自由空间光学 (FSO) 通信系统构成重大挑战,导致信号退化.
- 尼奎斯特脉冲塑造为提高光谱效率和抵御频道损害的弹性提供了潜力.
研究的目的:
- 在模拟的大气流道中实验演示80 Gbit/s的尼奎斯特-DWDM传输系统.
- 评估尼奎斯特脉冲塑造在不同流条件下的性能和弹性.
- 评估具有增强光谱效率和流弹性高容量FSO系统的可行性.
主要方法:
- 利用8个波长可调节的激光器与100 GHz间隔生成相锁尼奎斯特脉冲序列.
- 使用级联的马赫-泽恩德调制器用于脉冲生成和同步调制,具有10 Gbit/s PRBS.
- 使用温度梯度对流室模拟弱大气动荡,变化流强度 (Cn2).
主要成果:
- 随着流强度的增加,边缘和中央通道的信号噪声比 (SNR) 降低了6.5dB.
- 稳定的尼奎斯特波形形状和道间直角性在流中保持稳定.
- 在FEC值时,接收器的最低灵敏度为-17.66dBm,功率处罚低于5dB.
结论:
- 尼奎斯特脉冲塑造有效地减轻了FSO系统中的相变形和闪光效应.
- 经过证明的尼奎斯特-DWDM系统表现出增强的光谱效率和流弹性.
- 这些发现支持多波长FSO链路和混合光纤无线光学网络的可扩展性.
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