Abstract

We report a free-space quantum key distribution system designed for high-speed key transmission in urban areas. Clocking the system at gigahertz frequencies and efficiently filtering background enables higher secure key rates than those previously achieved by similar systems. The transmitter and receiver are located in two separate buildings 300 m apart in downtown Madrid and they exchange secure keys at rates up to 1 Mbps. The system operates in full bright daylight conditions with an average secure key rate of 0.5 Mbps and 24 h stability without human intervention.

© 2013 Optical Society of America

Full Article  |  PDF Article
More Like This
Free-space quantum key distribution in urban daylight with the SPGD algorithm control of a deformable mirror

Yun-Hong Gong, Kui-Xing Yang, Hai-Lin Yong, Jian-Yu Guan, Guo-Liang Shentu, Chang Liu, Feng-Zhi Li, Yuan Cao, Juan Yin, Sheng-Kai Liao, Ji-Gang Ren, Qiang Zhang, Cheng-Zhi Peng, and Jian-Wei Pan
Opt. Express 26(15) 18897-18905 (2018)

Entanglement-based quantum key distribution with biased basis choice via free space

Yuan Cao, Hao Liang, Juan Yin, Hai-Lin Yong, Fei Zhou, Yu-Ping Wu, Ji-Gang Ren, Yu-Huai Li, Ge-Sheng Pan, Tao Yang, Xiongfeng Ma, Cheng-Zhi Peng, and Jian-Wei Pan
Opt. Express 21(22) 27260-27268 (2013)

Engineering trade studies for a quantum key distribution system over a 30  km free-space maritime channel

John Gariano, Mark Neifeld, and Ivan Djordjevic
Appl. Opt. 56(3) 543-557 (2017)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (7)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (4)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription