论文标题
通过时间过滤的超快速hong-ou-mandel干涉法
Ultra-fast Hong-Ou-Mandel interferometry via temporal filtering
论文作者
论文摘要
由自发参数下转换（SPDC）产生的预示的单光子（HSP）是实现各种光子量子信息处理的有用资源。考虑到需要多个HSP的大规模实验，希望提高产生速率，而抑制高阶对创建是可取的。有希望的方法之一是使用具有GHz级重复率的泵激光器。但是，在如此高的重复速率状态下，单光子检测器只能部分识别脉冲。因此，我们开发了一个简单的模型来考虑对光谱纯度的影响，并在实验上证明了具有3.2 GHz-RepeTition-RepeTition-Rocke-Locked Pump泵脉冲的SPDC产生的两个独立HSP之间的高可见性Hong-ou-mandel干扰。观察到的0.88（3）可见性与我们的理论模型非常吻合。
Heralded single photons (HSPs) generated by spontaneous parametric down-conversion (SPDC) are useful resource to achieve various photonic quantum information processing. Given a large-scale experiment which needs multiple HSPs, increasing the generation rate with suppressing higher-order pair creation is desirable. One of the promising ways is to use a pump laser with a GHz-order repetition rate. In such a high repetition rate regime, however, single-photon detectors can only partially identify the pulses. Hence, we develop a simple model to consider that effect on the spectral purity, and experimentally demonstrate a high-visibility Hong-Ou-Mandel interference between two independent HSPs generated by SPDC with 3.2 GHz-repetition-rate mode-locked pump pulses. The observed visibility of 0.88(3) is in good agreement with our theoretical model.
