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arXiv:2002.00314 · Applied Physics Letters

Generation of pure-state single photons with high heralding efficiency by using a three-stage nonlinear interferometer

Jiamin Li, Jie Su, Liang Cui, Tianqi Xie, Z. Y. Ou, Xiaoying Li

Published May 18, 2020• 26 citations

Abstract

We experimentally study a fiber-based three-stage nonlinear interferometer and demonstrate its application in generating heralded single photons with high efficiency and purity by spectral engineering. We obtain a heralding efficiency of 90% at a brightness of 0.039 photons/pulse. The purity of the source is checked by two-photon Hong-Ou-Mandel interference with a visibility of 95 ± 6% (after correcting Raman scattering and multi-pair events). Our investigation indicates that the heralded source of single photons produced by the three-stage nonlinear interferometer has the advantages of high purity, high heralding efficiency, high brightness, and flexibility in wavelength and bandwidth selection.

DOI: 10.1063/5.0003601

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