TY - JOUR T1 - Advantages of high-speed technique for quantum key distribution; reply to quant-ph/0407050 Y1 - 2004 A1 - J. C. Bienfang A1 - Charles W. Clark A1 - Carl J. Williams A1 - E. W. Hagley A1 - Jesse Wen AB - We respond to a comment on our high-speed technique for the implementation of free-space quantum key distribution (QKD). The model used in the comment assigns inappropriately high link losses to the technique in question. We show that the use of reasonable loss parameters in the model invalidates the comment's main conclusion and highlights the benefits of increased transmission rates. UR - http://arxiv.org/abs/quant-ph/0407139v1 ER - TY - JOUR T1 - Quantum key distribution with 1.25 Gbps clock synchronization JF - Optics Express Y1 - 2004 A1 - J. C. Bienfang A1 - A. J. Gross A1 - A. Mink A1 - B. J. Hershman A1 - A. Nakassis A1 - X. Tang A1 - R. Lu A1 - D. H. Su A1 - Charles W Clark A1 - Carl J. Williams A1 - E. W. Hagley A1 - Jesse Wen AB - We have demonstrated the exchange of sifted quantum cryptographic key over a 730 meter free-space link at rates of up to 1.0 Mbps, two orders of magnitude faster than previously reported results. A classical channel at 1550 nm operates in parallel with a quantum channel at 845 nm. Clock recovery techniques on the classical channel at 1.25 Gbps enable quantum transmission at up to the clock rate. System performance is currently limited by the timing resolution of our silicon avalanche photodiode detectors. With improved detector resolution, our technique will yield another order of magnitude increase in performance, with existing technology. VL - 12 U4 - 2011 UR - http://arxiv.org/abs/quant-ph/0405097v1 CP - 9 J1 - Opt. Express U5 - 10.1364/OPEX.12.002011 ER -