Quantum key distribution over free space

Beutel F, Roediger J, Perlot N, Freund R, Benson O (2018)

Publication Type: Book chapter / Article in edited volumes

Publication year: 2018

Journal

NATO Science for Peace and Security Series B: Physics and Biophysics Springer Verlag

Publisher: Springer Verlag

Series: NATO Science for Peace and Security Series B: Physics and Biophysics

Pages Range: 357-359

DOI: 10.1007/978-94-024-1544-5_18

Abstract

Quantum key distribution (QKD) enables the creation of a common secret key between two remote parties that are connected by a quantum channel. In the time-frequency (TF)-QKD scheme, Alice encodes her bits either in the arrival time (Pulse Position Modulation) or in the center frequency (Frequency Shift Keying) of weak laser pulses. We have successfully implemented the TF-QKD scheme by using mostly off-the-shelf telecom components and avalanche photodiodes operating at 1550 nm. With our setup we achieve secret-key rates of more than 400 kbit/s back-to-back and 80 kbit/s over a 25 km fiber spool. Furthermore, we have tested our scheme over an outdoor free-space test range of 390 m in the Berlin city center and are currently in the process of extending it to longer outdoor test ranges.

Involved external institutions

Humboldt-Universität zu Berlin DE Germany (DE) Fraunhofer-Institut für Nachrichtentechnik (Heinrich-Hertz-Institut FhG HHI) DE Germany (DE)

How to cite

APA:

Beutel, F., Roediger, J., Perlot, N., Freund, R., & Benson, O. (2018). Quantum key distribution over free space. In (pp. 357-359). Springer Verlag.

MLA:

Beutel, Fabian, et al. "Quantum key distribution over free space." Springer Verlag, 2018. 357-359.

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