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; Xiaoying Li; Z.Y. Ou

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

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arxiv 2002.00314 v1 pith:JHRFN3ND submitted 2020-02-02 quant-ph

Jiamin Li , Jie Su , Liang Cui , Tianqi Xie , Z.Y. Ou , Xiaoying Li This is my paper

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keywords highefficiencyphotonsheraldinginterferometernonlinearpuritysingle

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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.

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