Generation of frequency-bin entangled two-photon state via cascaded second-order nonlinear processes

Zichang Zhang; Chenzhi Yuan; Ruiming Zhang; Hao Yu; Guangwei Deng; Heng Zhou; You Wang; Haizhi Song; Qiang Zhou

doi:10.1117/12.2537598

19 November 2019 Generation of frequency-bin entangled two-photon state via cascaded second-order nonlinear processes

Zichang Zhang, Chenzhi Yuan, Ruiming Zhang, Hao Yu, Guangwei Deng, Heng Zhou, You Wang, Haizhi Song, Qiang Zhou

Proceedings Volume 11195, Quantum and Nonlinear Optics VI; 111950X (2019) https://doi.org/10.1117/12.2537598
Event: SPIE/COS Photonics Asia, 2019, Hangzhou, China

Abstract

In this work, we propose and demonstrate the frequency-bin entangled two-photon state via cascaded second harmonic generation and spontaneous parametric down conversion (SHG-SPDC) processes in a single piece of PPLN waveguide. Our scheme is based on all fiber-pigtailed components at 1.5 μm telecom band. Two frequency-bins at 1531.34 nm and 1548.91 nm with bandwidth of 1.04 nm are prepared to be entangled. The frequency entanglement property of our generated two-photon states is measured by spatial two-photon quantum beating. A two-photon beating curve with a visibility of 87.92±0.47% is obtained, showing a good property of frequency-bin entanglement.

Citation Download Citation

Zichang Zhang, Chenzhi Yuan, Ruiming Zhang, Hao Yu, Guangwei Deng, Heng Zhou, You Wang, Haizhi Song, and Qiang Zhou "Generation of frequency-bin entangled two-photon state via cascaded second-order nonlinear processes", Proc. SPIE 11195, Quantum and Nonlinear Optics VI, 111950X (19 November 2019); https://doi.org/10.1117/12.2537598

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