Ma Lijun, Slattery Oliver, Chang Tiejun, Tang Xiao
Information Technology Laboratory, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD 20899, USA.
Opt Express. 2009 Aug 31;17(18):15799-807. doi: 10.1364/OE.17.015799.
We have experimentally implemented a non-degenerate sequential time-bin entangled photon-pair source using a periodically poled potassium titanyl phosphate waveguide at a clock rate of 1 GHz. The wavelengths of the signal and idler are 895 nm and 1310 nm, which are suitable for local and long distance optical communications, respectively and the 895 nm signal is also suitable for quantum memory research. A silicon avalanche photodiode is used to detect the photons at 895 nm while a periodically poled lithium niobate waveguide based up-conversion detector is used to detect the photons at 1310 nm. The measured entangled-photon-pair flux rate is 650 Hz and the fringe visibility for two-photon interference is 79.4% without noise subtraction.
我们通过使用周期极化磷酸钛氧钾波导，以1吉赫兹的时钟速率，实验实现了一种非简并的顺序时间-bin纠缠光子对源。信号光和闲频光的波长分别为895纳米和1310纳米，分别适用于本地和长距离光通信，并且895纳米的信号光也适用于量子存储研究。使用硅雪崩光电二极管检测895纳米处的光子，同时使用基于周期极化铌酸锂波导的上转换探测器检测1310纳米处的光子。在不进行噪声扣除的情况下，测得的纠缠光子对通量率为650赫兹，双光子干涉的条纹可见度为79.4%。
