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单波长多特拉比特模式分割多重复合自由空间光通信系统的系统校准
Optics express
|September 23, 2025
概括
本研究介绍了使用赫尔密特-高斯模式的自由空间光通信系统的光学校准策略. 它通过最大限度地减少交叉通话和信号扭曲,实现了创纪录的4.49 Tbit/s/λ数据速率.
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:
- 模式分割复杂化 (MDM) 对于增加自由空间光通信容量至关重要.
- 模式间交声是MDM系统的一个重大挑战,限制了性能.
- 精确的光学校准对于可靠的MDM系统运行至关重要.
研究的目的:
- 为单波长MDM MIMO自由空间光通信系统提出一种新的光学校准策略.
- 为了最大限度地减少系统中的模式间交叉声和信号扭曲.
- 为了最大限度地提高通信系统可实现的信息速率 (AIR).
主要方法:
- 在MDM MIMO系统中使用了6种赫尔密特-高斯模式.
- 在光学设置校准的接收器上使用更高阶模式.
- 实现了Volterra预扭曲,以最大限度地减少80 GBaud信号的信号扭曲.
- 传输了概率形状的256-QAM信号.
主要成果:
- 实现了创纪录的4.49 Tbit/s/λ 的AIR.
- 通过拟议的校准策略,成功地减少了模式间的交叉通话.
- 通过使用Volterra预扭曲,证明了有效的信号扭曲缓解.
结论:
- 拟议的光学校准策略显著提高了MDM MIMO自由空间光学通信系统的性能.
- 该系统展示了创纪录的数据速率,为未来的高容量光学无线通信铺平了道路.
- 优化信号处理技术和模式利用是克服自由空间光通信局限性的关键.
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