概括
本研究介绍了一种简化的直接检测系统,使用单个光二极管用于独立的四倍单侧波段信号. 它实现了高光谱效率,有望在高速光通信能力方面取得进步.
科学领域:
- 光学通信是指光学通信.
- 信号处理 信号处理
- 光子学 是一个光子学.
背景情况:
- 直接检测系统对于光通信至关重要.
- 独立的四倍单边带 (四倍SSB) 信号提供了增加数据容量的潜力.
- 传统系统通常需要复杂的过和多个组件.
研究的目的:
- 建议和验证独立四重SSB信号的简化直接检测系统.
- 分析这个系统在各种传输条件下的性能.
- 为了证明增强的频谱效率和传输能力.
主要方法:
- 使用I/Q调制器生成独立的四重SSB信号.
- 采用单一光二极管 (PD) 来接收信号,没有光学带宽过器 (OBPF).
- 实施数字信号处理 (DSP) 以将信号分成四个侧带并分析位误差率 (BER).
主要成果:
- 该系统成功地实现了7%的硬决策前置错误校正 (HD-FEC) 门,在5公里标准单模光纤 (SSMF) 上以各种 baud速率 (1-4 Gbaud) 实现.
- 接收光功率 (ROP) 的要求分别为1,2,4Gbaud的-21, -20和-17.2dBm.
- 增加侧带之间的频率间隔减少了交叉通话,并改善了BER.
结论:
- 对于独立的四重SSB信号,拟议的直接检测系统提供了简单的结构和高光谱效率.
- 这种方法可以扩大系统传输能力,提高高速光通信中的频谱效率.
- 简化系统对未来的光通信网络有很大的前景.
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