发表机构
ITMO University; Quanttelecom LLC.（ITMO大学; Quanttelecom有限责任公司）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文研究经典DWDM信道产生的自发拉曼散射噪声对副载波量子密钥分发系统的影响，提出评估QBER和安全密钥率的模型，发现脉冲模式在密钥率和传输距离上均优于连续波模式。
AI 中文摘要
本文研究了在单模光纤内，由密集波分复用（DWDM）网络的经典信道产生的自发拉曼散射（SpRS）噪声存在的情况下，副载波量子密钥分发（SCW QKD）系统的性能。我们提出了一个数学模型，用于在考虑SpRS噪声的情况下评估量子比特错误率（QBER）和安全密钥生成速率。我们考虑了SCW QKD系统的两种工作模式：使用连续波激光器的连续波模式和脉冲模式。对于这两种模式，我们根据经典DWDM接收机的灵敏度分析了系统性能。研究发现，在安全密钥生成速率和最大可达距离两方面，脉冲模式均优于连续波模式。
英文摘要
In this paper we study performance of the subcarrier-wave quantum key distribution system (SCW QKD) in the presence of spontaneous Raman scattering (SpRS) noise generated by classical channels of dense wavelength division multiplexing (DWDM) network within a single-mode optical fiber. We present the mathematical model for evaluation of the quantum bit error rate (QBER) and the secure key generation rate with the SpRS noise taken into account. We consider two regimes of the SCW QKD system: the continuous wave regime that uses continuous wave laser and the pulsed regime. For these regimes, performance of the system is analyzed depending on receiver sensitivity of classical DWDM. It is found that the pulsed regime outperforms the continuous wave regime in both the secure key generation rate and the maximum achievable distance.
Comments17 pages, 5 figures, 1 table
Journal refJ. Opt. Soc. Am. B 38, 595-601 (2021)
