Time-bin entangled photon pairs from spontaneous parametric down-conversion pumped by a cw multi-mode diode laser

Osung Kwon; Kwang-Kyoon Park; Young-Sik Ra; Yong-Su Kim; Yoon-Ho Kim

doi:10.1117/12.2078982

4 March 2015 Time-bin entangled photon pairs from spontaneous parametric down-conversion pumped by a cw multi-mode diode laser

Osung Kwon, Kwang-Kyoon Park, Young-Sik Ra, Yong-Su Kim, Yoon-Ho Kim

Author Affiliations +

Proceedings Volume 9377, Advances in Photonics of Quantum Computing, Memory, and Communication VIII; 93770G (2015) https://doi.org/10.1117/12.2078982
Event: SPIE OPTO, 2015, San Francisco, California, United States

Abstract

The Franson interferometer consists of two spatially separated unbalanced Mach-Zehnder interferometers through which the signal and the idler photons from spontaneous parametric down-conversion (SPDC) are made to transmit. It is often used to prepare time-bin entanglement of two photons in the two SPDC pumping regimes: the narrowband regime and the double-pulse regime. In the narrowband regime, the SPDC process is pumped by a narrowband cw laser with the coherence length much longer than the path length difference of the Franson interferometer. In the double-pulse regime, the longitudinal separation between the pulse pair is made equal to the path length difference of the Franson interferometer. In this paper, we propose another regime by which the generation of time-bin entanglement is possible and demonstrate the scheme experimentally.

Citation Download Citation

Osung Kwon, Kwang-Kyoon Park, Young-Sik Ra, Yong-Su Kim, and Yoon-Ho Kim "Time-bin entangled photon pairs from spontaneous parametric down-conversion pumped by a cw multi-mode diode laser", Proc. SPIE 9377, Advances in Photonics of Quantum Computing, Memory, and Communication VIII, 93770G (4 March 2015); https://doi.org/10.1117/12.2078982

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