Optimization of a heralded single-photon source with spatial and temporal multiplexing

18th International Youth Scientific School "Coherent Optics and Optical Spectroscopy"

Latypov, I.Z.^1 ; Shkalikov, A.V.^1 ; Kalachev, A.A.^1,2,3

Zavoisky Physical-Technical Institute, 10/7, Sibirsky tract str., Kazan

420029, Russia^1

Kazan Federal University, 18, Kremlevskaya str., Kazan

420008, Russia^2

Institute for Informatics, Tatarstan Academy of Sciences, 36a, Levobulachnaya, Kazan

420011, Russia^3

关键词: Autocorrelation functions;    Heralded single photon sources;    Its efficiencies;    Number of switches;    Temporal and spatial;    Temporal multiplexing;    Total efficiency;    Variable time delay;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/613/1/012009/pdf
DOI  :  10.1088/1742-6596/613/1/012009

来源: IOP

【 摘 要 】

The properties of a heralded single-photon source with temporal and spatial multiplexing are studied with the aim to maximize its efficiency for a given value of the second-order zero-time autocorrelation function. We show that the variable time delay, which is used for temporal multiplexing, can be optimized so that the mean number of photon passes through the switches and the total number of switches are respectively reduced to ∼ log2N and ∼ (1/2)log2N, where N is the temporal multiplexing degree. The total efficiency of such an optimized source is calculated for typical switching losses and the autocorrelation function is calculated in the presence of the detector dark-count noise.