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arXiv · 2311.08482

High-resolution coincidence counting system for large-scale photonics applications

Josef Hloušek·Jan Grygar·Michal Dudka·Miroslav Ježek
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Abstract

The increasing complexity of the recent photonic experiments challenges developing efficient multi-channel coincidence counting systems with high-level functionality. Here, we report a coincidence unit able to count detection events ranging from singles to 16-fold coincidences with full channel-number resolution. The device operates within sub-100~ps coincidence time windows, with a maximum input frequency of 1.5~GHz and an overall jitter of less than 10~ps. The unit high-level timing performance renders it suitable for quantum photonic experiments employing low-timing-jitter single-photon detectors. Additionally, the unit can be used in complex photonic systems to drive feed-forward loops. We have demonstrated the developed coincidence counting unit in photon-number-resolving detection to directly quantify the statistical properties of light, specifically coherent and thermal states, with a fidelity exceeding 0.999 up to 60~photons.

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Josef Hloušek, Jan Grygar, Michal Dudka, Miroslav Ježek. 2023-11-14. High-resolution coincidence counting system for large-scale photonics applications. https://doi.org/10.1103/physrevapplied.21.024023

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