Bright heralded source based on SWFM reaching theoretical single-photon purity

Haoyang Wang; Huihong Yuan; Qiang Zeng; Lai Zhou; Haiqiang Ma; Zhiliang Yuan

doi:10.1117/12.3023057

9 October 2024 Bright heralded source based on SWFM reaching theoretical single-photon purity

Haoyang Wang, Huihong Yuan, Qiang Zeng, Lai Zhou, Haiqiang Ma, Zhiliang Yuan

Proceedings Volume 13120, Quantum Nanophotonic Materials, Devices, and Systems 2024; 1312007 (2024) https://doi.org/10.1117/12.3023057
Event: Nanoscience + Engineering, 2024, San Diego, California, United States

Conference Poster

Abstract

We derive the theoretical limit of single-photon purity of heralded single-photon sources and accordingly demonstrate a bright, gigahertz-pulsed heralded source with the purity saturating the limit. Based on spontaneous four-wave mixing in a silicon spiral waveguide, this on-chip source is measured to have a coincidence rate exceeding 1.5MHz at a coincidence to accidental (CAR) ratio of 16.77. The single-photon purity, quantified by the auto-correlation function g_h⁽²⁾(0), reaches the theoretical limit with the lowest value of 0.00094 ± 0.00002 obtained at a coincidence rate of 0.8kHz. We attribute our results to effective spectral filtering as well as the coherent pump condition helped by optical injection locking.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Haoyang Wang, Huihong Yuan, Qiang Zeng, Lai Zhou, Haiqiang Ma, and Zhiliang Yuan "Bright heralded source based on SWFM reaching theoretical single-photon purity", Proc. SPIE 13120, Quantum Nanophotonic Materials, Devices, and Systems 2024, 1312007 (9 October 2024); https://doi.org/10.1117/12.3023057

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