Browsing by Subject "inerferometer"

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    Generation of pure-state single photons with high heralding efficiency by using a three-stage nonlinear interferometer
    (American Institute of Physics, 2020-05-18) Li, Jiamin; Su, Jie; Cui, Liang; Xie, Tianqi; Ou, Z. Y.; Li, Xiaoying; Physics, School of Science
    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.