激光与光电子学进展, 2019, 56 (8): 082701, 网络出版: 2019-07-26
测量设备无关的经典-量子信号共纤传输方案 下载: 941次
Scheme of Measurement-Device-Independent Classical-Quantum Signal Transmission in Shared Fiber
量子光学 测量设备无关 拉曼散射 经典-量子信号 quantum optics measurement-device-independence Raman scattering classical-quantum signal
摘要
提出了一种基于测量设备无关协议的经典-量子信号共纤传输方案。推导了自发拉曼散射噪声计数率公式,分析了经典信号入射功率、量子信号复用路数和量子信号平均光子数对量子密钥分配性能的影响。数值仿真结果表明,当经典信号入射功率为0 dBm(即通信容量为84.8 Gbit/s)时,所提方案量子密钥分配的最大安全传输距离可达141 km;当入射功率增加到11 dBm(即通信容量为1.068 Tbit/s)时,仍然可达100 km。相比于现有的最优传输方案,所提方案量子密钥分配的最大安全传输距离延长了26 km;虽然随着经典信号入射功率的增加,量子密钥分配性能有所下降,但是可以通过采用多路量子信号复用和优化量子信号的平均光子数来进行性能补偿。
Abstract
A scheme of classical-quantum signal transmission in a shared fiber is proposed based on a measurement-device-independent protocol. The counting rate formula of spontaneous Raman scattering noise is deduced and the effects of the incident power of classical signals, channel number of quantum signals and average photon numbers of quantum signals on the quantum key distribution (QKD) performances are analyzed. The numerical simulation results show that the maximum safe transmission distance for the QKD by the proposed scheme is up to 141 km when the incident power of classical signals is 0 dBm (i.e., the communication capacity of 84.8 Gbit/s). Even when the incident power increases to 11 dBm (i.e., the communication capacity of 1.068 Tbit/s), it is still up to 100 km. Compared with the existing optimal transmission scheme, the maximum safe transmission distance of the QKD by the proposed scheme is extended by 26 km. Although the QKD performance decreases with the increase of the incident power of classical signals, the performance can be compensated by the multiplexing channels of quantum signals and the optimization of the average photon numbers of quantum signals.
程康, 周媛媛, 王欢. 测量设备无关的经典-量子信号共纤传输方案[J]. 激光与光电子学进展, 2019, 56(8): 082701. Kang Cheng, Yuanyuan Zhou, Huan Wang. Scheme of Measurement-Device-Independent Classical-Quantum Signal Transmission in Shared Fiber[J]. Laser & Optoelectronics Progress, 2019, 56(8): 082701.