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Optics Communications

High-brightness photon pairs and strongly antibunching heralded single photons from a highly nonlinear optical fiber

N. L. Petrov, Andrei B. Fedotov, Aleksei M. Zheltikov

Published May 3, 2019• 14 citations
Publisher
DOI
10.1016/j.optcom.2019.04.084

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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.