High Speed Fiber-Based Quantum Key Distribution using Polarization Encoding

Published

October 5, 2005

Author(s)

Xiao Tang, Lijun Ma, Alan Mink, Anastase Nakassis, Barry J. Hershman, Joshua Bienfang, Ronald Boisvert, Charles W. Clark, Carl J. Williams, A Gross, E Hagley, J Wen

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 5 = 0.1. With a number of proposed improvements this system has a potential for a higher key rate without an elevated error rate.

Proceedings Title

Proceedings of SPIE, 5893, Optics and Photonics Conference

Conference Dates

August 1-4, 2005

Conference Location

San Diego, CA, USA

Pub Type

Conferences

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Citation

Tang, X. , Ma, L. , Mink, A. , Nakassis, A. , Hershman, B. , Bienfang, J. , Boisvert, R. , Clark, C. , Williams, C. , Gross, A. , Hagley, E. and Wen, J. (2005), High Speed Fiber-Based Quantum Key Distribution using Polarization Encoding, Proceedings of SPIE, 5893, Optics and Photonics Conference, San Diego, CA, USA, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=150121 (Accessed April 26, 2024)