High speed fiber-based quantum key distribution using polarization encoding

Xiao Tang; Lijun Ma; Alan Mink; Anastase Nakassis; Barry Hershman; Joshua Bienfang; Ronald F. Boisvert; Charles Clark; Carl Williams

doi:10.1117/12.614598

25 August 2005 High speed fiber-based quantum key distribution using polarization encoding

Xiao Tang, Lijun Ma, Alan Mink, Anastase Nakassis, Barry Hershman, Joshua Bienfang, Ronald F. Boisvert, Charles Clark, Carl Williams

Author Affiliations +

Proceedings Volume 5893, Quantum Communications and Quantum Imaging III; 58931A (2005) https://doi.org/10.1117/12.614598
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

We have implemented a quantum key distribution (QKD) system with polarization encoding at 850 nm over 1 km of optical fiber. The high-speed management of the bit-stream, generation of random numbers and processing of the sifting algorithm are all handled by a pair of custom data handling circuit boards. As a complete system using a clock rate of 1.25 Gbit/s, it produces sifted keys at a rate of 1.1 Mb/s with an error rate lower than 1.3% while operating at a transmission rate of 312.5 Mbit/s and a mean photon number μ = 0.1. With a number of proposed improvements this system has a potential for a higher key rate without an elevated error rate.

Citation Download Citation

Xiao Tang, Lijun Ma, Alan Mink, Anastase Nakassis, Barry Hershman, Joshua Bienfang, Ronald F. Boisvert, Charles Clark, and Carl Williams "High speed fiber-based quantum key distribution using polarization encoding", Proc. SPIE 5893, Quantum Communications and Quantum Imaging III, 58931A (25 August 2005); https://doi.org/10.1117/12.614598

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