Quantum Communication Experiments Over Optical Fiber

Part of the Lecture Notes in Physics book series (LNP, volume 911)


Quantum key distribution (QKD) is expected to be the first application of quantum information to be realized as a practical system. In the last decade, research on QKD made significant progress both in concept and technology. In this chapter, we review the progress of technologies designed to realize high-speed and long-distance quantum communication over optical fiber, focusing on the results obtained by NTT. The first section describes a roadmap towards scalable quantum communications, which is composed of three phases. The second section reviews our effort to realize phase 1 quantum communication systems, namely point-to-point QKD systems based on the differential phase shift QKD (DPS-QKD) protocol. The third section describes entanglement generation and application in the telecom band, which are the key technologies for realizing phase 2 and 3 systems. The final section provides a summary and describes the future outlook.


Quantum communication Quantum key distribution Entanglement Optical fiber 



The work described here is the result of collaborations with many researchers. I would like to thank all my collaborators, in particular Prof. Kyo Inoue (Osaka University) and Dr. Toshimori Honjo (NTT Laboratories).


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Copyright information

© Springer Japan 2016

Authors and Affiliations

  1. 1.NTT Basic Research LaboratoriesNTT CorporationAtsugiJapan

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