Ultra-fast Hong-Ou-Mandel interferometry via temporal filtering
Ultra-fast Hong-Ou-Mandel interferometry via temporal filtering
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DOI：
10.1364/oe.430502
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发表时间：
2021-11-08
期刊：
影响因子：
3.8
通讯作者：
Takeoka, Masahiro
中科院分区：
文献类型：
--
作者：
Tsujimoto, Yoshiaki;Wakui, Kentaro;Takeoka, Masahiro
自发参数下转换（SPDC）产生的预示单光子（HSPs）是实现各种光子量子信息处理的有用资源。对于需要多个HSPs的大规模实验，通过抑制高阶对的产生来提高生成速率是可取的。一种很有前途的方法是使用具有ghz级重复率的泵浦激光器。然而，在如此高的重复频率下，单光子探测器只能部分识别脉冲。因此，我们建立了一个简单的模型来考虑对光谱纯度的影响，并通过实验证明了由重复频率为3.2 ghz的锁模泵浦脉冲的SPDC产生的两个独立的HSPs之间存在高可见性的Hong-Ou-Mandel干扰。观测到的能见度为0.88(3)，与理论模型吻合较好。(C) 2021年美国光学学会根据OSA开放获取出版协议的条款
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. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement