Design and Testing of Coincidence Module for Quantum Optical Research
Haoqian Xu, D. J. Li, Yuxuan Chen, Haoshu Tian, Jiajun Qin, Hao Han, Zhe Cao, Jiaming Li, Kairen Chen, Lei Zhao · 2025
In the field of quantum optics, especially in various experiments involving characterizing entangled photon pairs or quantum correlation effects, coincidence systems are primarily employed to detect and record temporal correlations between multiple photon events. Certain experiments propose higher requirements for the time precision of coincidence electronics, aiming to achieve high-precision time measurements with single-channel time resolution of ~10 ps RMS. To support diverse quantum optics experiments, a 32-channel high-precision coincidence module has been designed and fabricated. A series of tests have been conducted, and the results show that the time precision of each channel of the electronics is better than 10 ps RMS. Furthermore, preliminary experimental applications in quantum optics experiments have been successfully conducted.