Holloway Catherine, Meyer-Scott Evan, Erven Chris, Jennewein Thomas
Institute for Quantum Computing, University of Waterloo, 200 University Ave., West Waterloo, Ontario, N2L 3G1, Canada.
Opt Express. 2011 Oct 10;19(21):20597-603. doi: 10.1364/OE.19.020597.
We demonstrate the distribution of polarization-entangled photons for the purpose of quantum key distribution (QKD) along active telecom fibers. Entangled photon pairs of 810 nm wavelength generated by a Sagnac interferometer source were coupled into standard telecom single mode fibers. The fibers were either dark or carrying a standardized 1550 nm ethernet signals (1000BASE-ZX) with a nominal speed of 1 GBps from regular media converter devices, without any requirements on the optical power or spectrum transmitted. Our system demonstrates a QKD network covering 6 km in distance with a central service provider for classical and quantum data.
我们展示了用于量子密钥分发（QKD）的偏振纠缠光子沿着有源电信光纤的分布情况。由萨格纳克干涉仪源产生的波长为810 nm的纠缠光子对被耦合到标准电信单模光纤中。这些光纤要么处于闲置状态，要么承载着来自常规媒体转换器设备的标称速度为1 GBps的标准化1550 nm以太网信号（1000BASE-ZX），对传输的光功率或光谱没有任何要求。我们的系统展示了一个覆盖6公里距离的QKD网络，该网络有一个用于经典和量子数据的中央服务提供商。
