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Open AccessArticle

Generation of Pure State Photon Triplets in the C-Band

1
State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
2
Department of physics, Jiangxi Normal University, Nanchang 330022, China
*
Author to whom correspondence should be addressed.
Micromachines 2019, 10(11), 775; https://doi.org/10.3390/mi10110775
Received: 11 October 2019 / Revised: 9 November 2019 / Accepted: 10 November 2019 / Published: 13 November 2019
(This article belongs to the Special Issue Nonlinear Photonics Devices)
In this work, the cascaded second-order spontaneous parametric down-conversion (SPDC) is considered to produce pure state photon triplets in periodically poled lithium niobite (PPLN) doped with 5% MgO. A set of parameters are optimized through calculating the Schmidt number of two-photon states generated by each down-conversion process with different pump durations and crystal lengths. We use a Gaussian filter in part and obtain three photons with 100% purity in spectrum. We provide a feasible and unprecedented scheme to manipulate the spectrum purity of photon triplets in the communication band (C-band). View Full-Text
Keywords: pure state; cascaded spontaneous parametric down-conversion (SPDC); numerical simulation pure state; cascaded spontaneous parametric down-conversion (SPDC); numerical simulation
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MDPI and ACS Style

Su, X.-R.; Huang, Y.-W.; Xiang, T.; Li, Y.-H.; Chen, X.-F. Generation of Pure State Photon Triplets in the C-Band. Micromachines 2019, 10, 775.

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