Intensity modulator for secure, stable, and high-performance decoy-state quantum key distribution

• DOI: 10.1038/s41534-021-00418-x
• Publication Date: 2021-05-20T10:03:08Z
• Authors: Feng-Yu Lu; Xing Lin; Shuang Wang; Guan-Jie Fan-Yuan; Peng Ye; Rong Wang; Zhen-Qiang Yin; De-Yong He; Wei Chen; Guang-Can Guo; Zheng-Fu Han
• Keywords: Quantum key distribution; Decoy; Modulation (music); Key generation

Abstract The decoy-state method substantially improves the performance of quantum key distribution (QKD) and perfectly solves crucial issues caused by multiphoton pulses. In recent years, has occupied a position in practicality, almost all QKD systems have employed method. However, imperfections traditional intensity modulators limit bring side channels. this work, special modulator its accompanying modulation are designed experimentally verified for secure, stable, high-performance QKDs. experimental result indicates that stable adjustable intensities, convenient two-level modulation, inherently high speed, compact structure is extremely fit future trends will help to be applied systems.