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Updated: Jun 19, 2025

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Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
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量子密钥分布和古典通信在空心和多核纤维上的增强共存
Weiwen Kong1, Yongmei Sun2, Tianqi Dou1
1China Telecom Research Institute, Beijing 102200, China.
Entropy (Basel, Switzerland)
|July 26, 2024
概括
本研究探讨了不同纤维类型的量子密钥分布 (QKD),提出波长分配方案以提高性能. 与空心纤维 (HCF) 相比,多核纤维 (MCF) 在信号共存时可以实现更长的安全传输距离.
科学领域:
- 光学通信是指光学通信.
- 量子密码学 量子密码学
- 光纤光学是指光纤的使用.
背景情况:
- 经典的光学通信可以干扰量子密钥分布 (QKD).
- 像自发拉曼散射 (SpRS) 和四波混合 (FWM) 这样的噪声源会降低QKD性能,而不是空心纤维 (HCF),多核纤维 (MCF) 和单核纤维 (SCF).
研究的目的:
- 调查古典光通信对HCF,MCF和SCF的QKD性能的影响.
- 提出和评估波长分配方案,以提高QKD性能,并使经典和QKD信号同时传输.
主要方法:
- 在QKD中对不同纤维类型的噪声干扰 (SpRS,FWM) 进行理论分析.
- 关于联合噪声抑制波长分配 (JSWA),FWM噪声抑制波长分配和拉曼噪声抑制波长分配方案的建议和比较.
- 在同时传输经典信号的情况下,QKD传输距离的性能评估.
主要成果:
- 拟议的JSWA方案显著扩大了古典信号和QKD的同时传输距离.
- 大约100公里 (HCF) 和165公里 (MCF) 的距离,每通道的经典功率为10dBm.
- 当经典信号和QKD信号都在C频段时,MCF提供了比HCF更长的安全传输距离.
- 当经典信号在C频段,而QKD在O频段运行时,HCF的性能优于MCF.
结论:
- 该JSWA方案有效地减轻了噪声,并提高了共存光通信系统中的QKD性能.
- 根据经典和QKD信号的波长分配,MCF和HCF具有明显的优势.
- 这项研究为设计和部署强大的QKD光学网络提供了基础的见解.
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