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- Title
Intensity modulator for secure, stable, and high-performance decoy-state quantum key distribution.
- Authors
Lu, Feng-Yu; Lin, Xing; Wang, Shuang; Fan-Yuan, Guan-Jie; Ye, Peng; Wang, Rong; Yin, Zhen-Qiang; He, De-Yong; Chen, Wei; Guo, Guang-Can; Han, Zheng-Fu
- 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, the decoy-state method has occupied a key position in practicality, and almost all the QKD systems have employed the decoy-state method. However, the imperfections of traditional intensity modulators limit the performance of the decoy-state method and bring side channels. In this work, a special intensity modulator and its accompanying modulation method are designed and experimentally verified for the secure, stable, and high-performance decoy-state QKDs. The experimental result indicates that its stable and adjustable intensities, convenient two-level modulation, inherently high speed, and compact structure is extremely fit for future trends and will help the decoy-state method to be perfectly applied to QKD systems.
- Publication
NPJ Quantum Information, 2021, Vol 7, Issue 1, p1
- ISSN
2056-6387
- Publication type
Article
- DOI
10.1038/s41534-021-00418-x