概括
一个新的极化分裂多重非对称双双单侧带载波辅助差异检测 (PDM-ATSSB CADD) 方案可以在没有局部振荡器激光器的情况下恢复光学场. 这种方法提高了性能,并减少了数据中心互连的硬件需求.
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:
- 载波辅助差分检测 (CADD) 通过重建复杂值的双侧带 (CV-DSB) 信号而实现高容量,成本敏感的短距离光通信,而无需局部振荡器激光.
- 现有的CADD方案面临着极化色和信号-信号节拍干扰 (SSBI) 极化分裂多重 (PDM) 信号的挑战.
研究的目的:
- 提出和验证一种新的极化分裂多重化不对称双单侧带CADD (PDM-ATSSB CADD) 方案,用于有效地恢复PDM CV-DSB信号的光场.
- 开发一个共同的SSBI代缓解算法,以解决SSBI内部和间极化问题.
- 评估数据中心互连的拟议方案的性能和潜在硬件效率.
主要方法:
- 实现PDM-ATSSB CADD接收器,使用一对光学带宽过器 (OBPF) 来抑制不需要的极化元件并恢复双极化光场.
- 使用不对称的双SSB信号来放松光学波器边缘度要求.
- 开发和应用一个共同的SSBI代缓解算法,用于内部和间极化SSBI.
- 数字模拟来分析参数优化 (光学延迟,代) 和相位噪声,相对强度噪声和极化损害的影响.
主要成果:
- 成功验证了30个Gbaud PDM不对称双SSB 16-ary正方形振幅调制信号的PDM-ATSSB CADD方案.
- 与PDM-STSSB CADD (PDM-STSSB CADD) 相比,所需的频率差距被证明减少1GHz,以达到7%的前错误校正 (FEC) 值.
- 在OSNR灵敏度上取得了大约3dB的改善.
- 识别了简化的 PDM-ATSSB CADD 方案作为潜在的硬件效率高的解决方案.
结论:
- 拟议的PDM-ATSSB CADD方案有效地恢复PDM光场并减轻SSBI,比现有方法提供显著的性能改进.
- 该方案放松了光学波器的要求,并证明了对各种噪声和偏振损害的稳定性.
- 简化版本为地铁和数据中心之间的互连应用提供了有希望的,硬件效率高的候选人.
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