In this paper, we revisit the well-known Hong-Ou-Mandel (HOM) effect in which two photons, which meet at a beamsplitter, can interfere destructively, leading to null in coincidence counts. In a standard HOM measurement, the coincidence counts across the two output ports of the beamsplitter are monitored as the temporal delay between the two photons prior to the beamsplitter is varied, resulting in the well-known HOM dip. We show, both theoretically and experimentally, that by leaving the delay fixed at a particular value while relying on spectrally-resolved coincidence photon-counting, we can reconstruct the HOM dip, which would have been obtained through a standard delay-scanning, non-spectrally-resolved HOM measurement. We show that our numerical reconstruction procedure exhibits a novel dispersion cancellation effects, to all orders. We discuss how our present work can lead to a drastic reduction in the time required to acquire a HOM interferogram, and specifically discuss how this could be of particular importance for the implementation of efficient quantum-optical coherence tomography devices.

中文翻译：

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用于量子光学相干断层扫描的光谱分辨 Hong-Ou-Mandel 干涉测量法

在本文中，我们重新审视了众所周知的 Hong-Ou-Mandel (HOM) 效应，其中两个光子在分束器处相遇，可以相消干涉，导致重合计数为零。在标准 HOM 测量中，随着分束器之前两个光子之间的时间延迟发生变化，会监测分束器两个输出端口的重合计数，从而导致众所周知的 HOM 倾角。我们在理论上和实验上都表明，通过将延迟固定在特定值，同时依靠光谱解析的重合光子计数，我们可以重建 HOM 倾角，这可以通过标准延迟扫描获得，非光谱分辨 HOM 测量。我们表明，我们的数值重建程序对所有订单都表现出新的色散抵消效果。