Impact of spontaneous Raman scattering on quantum channel wavelength-multiplexed with classical chan

• 作 者: 于宁娜 董照月 王金东 魏正军 张智明
• 机 构: Laboratory of Nanophotonic Functional Materials and Devices(SIPSE) and Laboratory of Quantum Enginee
• 出 处: Chinese Optics Letters
• 发表日期: 2014年10期
• 关键词: spontaneous Stokes repetition exactly multiplexing photon removed degrade transf

In the quantum key distribution system,quantum channel is always affected by spontaneous Raman scattering noise when it transmits with classical channels that act as synchronization and data channels on a shared fiber. To study the effect of the noise exactly,the temporal distribution characteristics of the Raman scattering noise are analyzed theoretically and measured by a single-photon detector. On the basis of this,a scheme to decrease the noise is proposed.

In the quantum key distribution system, quantum channel is always affected by spontaneous Raman scattering noise when it transmits with classical channels that act as synchronization and data channels on a shared fiber. To study the effect of the noise exactly, the temporal distribution characteristics of the Raman scattering noise are analyzed theoretically and measured by a single-photon detector. On the basis of this, a scheme to decrease the noise is proposed.