论文标题
通过电信纤维使用近红外非脱位光子对通过电信纤维进行高质量的纠缠分布
High quality entanglement distribution through telecommunication fiber using near-infrared non-degenerate photon pairs
论文作者
论文摘要
对于实用的量子通信，必须考虑整个系统（源，量子通道和检测器）的效率。在许多城市环境中，具有电信光纤（确认ITU G.652D标准）形式的量子通道可用，但是该范围内的检测器通常具有较低的效率。我们调查了在近红外范围内制备的纠缠光子（NIR）可以成功传输的校园型通信的可能性，同时可以保留极化纠缠。我们通过标准的电信纤维在810 nm附近的波长变性和非分类的光子对的分布。该技术受益于NIR单光子检测器的高效率以及约810 nm的设置的成熟设计。在这项工作中，我们在12公里后获得了高质量的纠缠（基于原始数据的可见性为94.8％），相当于纤维诱导的损失约-36 db。
For practical quantum communications, the efficiency of the entire system (source, quantum channel and detectors) must be taken into account. In many urban environments, the quantum channel in the form of telecommunication optical fiber (confirming to ITU G.652D standards) are available, but the detectors in this range typically have low efficiency. We investigate the possibility that for campus-type communications, entangled photons prepared in the Near-Infrared Range (NIR) can be transmitted successfully while preserving polarization entanglement. We demonstrate the distribution of degenerate and non-degenerate entangled photon pairs of wavelength around 810 nm through standard telecommunication fiber. This technique benefits from the high efficiency of the NIR single photon detectors and the mature design of setups around 810 nm.. In this work, we obtain high quality entanglement (visibility is 94.8\% based on the raw data) after an overall distance of 12 km, corresponding to about -36 dB of fiber induced loss.
