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unige:36779 
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Low jitter up-conversion detectors for telecom wavelength GHz QKD |
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| Published in | New Journal of Physics. 2006, vol. 8, no. 3, p. 32-32 | |
| Abstract | We have developed a hybrid single photon detection scheme for telecom wavelengths based on nonlinear sum-frequency generation and silicon single-photon avalanche diodes (SPADs). The SPAD devices employed have been designed to have very narrow temporal response, i.e. low jitter ∼40 ps, which we can exploit for increasing the allowable bit rate for quantum key distribution. The wavelength conversion is obtained using periodically poled lithium niobate waveguides (W/Gs). The inherently high efficiency of these W/Gs allows us to use a continuous wave laser to seed the nonlinear conversion so as to have a continuous detection scheme. We also present a 1.27 GHz qubit repetition rate, one-way phase encoding, quantum key distribution experiment operating at telecom wavelengths that takes advantage of this detection scheme. The proof-of-principle experiment shows a system capable of MHz raw count rates with a QBER less than 2% and estimated secure key rates greater than 100 kbit s - 1 over 25 km. | |
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Article (Published version) (251 Kb) - Free access Other version: http://stacks.iop.org/1367-2630/8/i=3/a=032?key=crossref.5615f567ea6867a27b1285c7feb0641b |
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| Citation (ISO format) | THEW, Robert Thomas et al. Low jitter up-conversion detectors for telecom wavelength GHz QKD. In: New Journal of Physics, 2006, vol. 8, n° 3, p. 32-32. https://archive-ouverte.unige.ch/unige:36779 |
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