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High Speed Fiber-Based Quantum Key Distribution using Polarization Encoding



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


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


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], (Accessed July 21, 2024)


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Created October 4, 2005, Updated October 12, 2021