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arXiv · 2207.04758

Telecom-band Multi-Type Spontaneous Parametric Downconversion in Periodically Polarized Nonlinear Materials

Xi-Yu Liu·Ya-Fei Yu·Zheng-Jun Wei·Tian-Ming Zhao·Jin-Dong Wang
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Abstract

Spontaneous parametric downconversion is an essential technique in quantum optics experiments. In this paper, various quasi-phase-matching processes in several typical periodically polarized nonlinear materials are analyzed and calculated. Furthermore, a general method for realizing multiple types of quasi-phase-matching in a monolithic material is presented. Finally, a novel design to prepare multiple entangled photon pairs based on the Sagnac interferometer is discussed. This technology can be applied to tiny optical paths in the telecom C band, saving both cost and space.

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Xi-Yu Liu, Ya-Fei Yu, Zheng-Jun Wei, Tian-Ming Zhao, Jin-Dong Wang. 2022-07-11. Telecom-band Multi-Type Spontaneous Parametric Downconversion in Periodically Polarized Nonlinear Materials. https://arxiv.org/abs/2207.04758

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