News & Event


News & Event


Practical fiber-optic quantum key distribution


Practical fiber-optic quantum key distribution


December 21, 5:00 pm


Dr. Zhiliang Yuan (Chief Scientist, Beijing Academy of Quantum Information Sciences)



In this talk, the author will review recent advances in fiber optic quantum key distribution (QKD), including high bit rate systems [1], coherent laser seeding based transmitter [2] as well as its photonic integration [3], and ultra-long distance quantum communication using twin coherent fields [4,5]. 


[1] Z. L. Yuan et al., “10 Mb/s quantum key distribution,” J. Lightwave Technol. 36, 3427 (2018). 

[2] Z. L. Yuan et al., “Directly phase-modulated light source,” Phys. Rev. X 6, 031044 (2016). 

[3] T. K. Paraïso et al., “A photonic integrated quantum secure communication system,” Nature Photon. 15, 850-856 (2021). 

[4] M. Lucamarini et al., “Overcoming the rate-distance limit of quantum key distribution without quantum repeater,” Nature 557, 400–403 (2018).

[5] M. Pittaluga & M. Minder et al., “600 km repeater-like quantum communication with dual-band stabilisation,” Nature Photon. 15, 530 – 535 (2021).




Dr. Zhiliang Yuan received his doctoral and post-doctoral training from Institute of Semiconductors, Chinese Academy of Sciences (1993 – 1997) and University of Oxford (1997-2001), respectively. He then spent 20-years at Toshiba Cambridge Research Laboratory before taking up the prestigious appointment as Chief Scientist at Beijing Academy of Quantum Information Sciences (BAQIS).

He is renowned for high-speed quantum key distribution (QKD), with notable achievements including the first 100 km (2003) and 600km (2020) fiber communication distances as well as the first 1 Mbit/s (2008) and 10 Mbit/s (2018) QKD systems. His other contributions include the first single photon LED (2001), self-differencing detectors (2006), directly phase-modulated source (2015) and twin-field QKD protocol (2017). He has published 130+ refereed journal publications, 130+ conference papers including 40+ invited/post-deadline, and 50+ patents.