Generation of Polarization-Entangled Photon Pairs in the Spontaneous Parametric Down Conversion Process in Periodically-Poled Potassium Titanyl Phosphate

2016 ◽  
Vol 66 (9) ◽  
pp. 1138-1143
Author(s):  
Su Hyun KIM ◽  
Han Seb MOON*
Keyword(s):  
Conversion Process ◽  
Potassium Titanyl Phosphate ◽  
Periodically Poled ◽  
Photon Pairs ◽  
Parametric Down Conversion ◽  
Entangled Photon Pairs ◽  
Down Conversion

scholarly journals Coherently controlled quantum features in a coupled interferometric scheme

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Byoung S. Ham
Keyword(s):  
Optical Materials ◽  
Bell Inequality ◽  
Third Order ◽  
Deterministic Method ◽  
Photon Pairs ◽  
Wave Nature ◽  
Parametric Down Conversion ◽  
Pair Generation ◽  
Entangled Photon Pairs ◽  
Down Conversion

AbstractOver the last several decades, entangled photon pairs generated by spontaneous parametric down conversion processes in both second-order and third-order nonlinear optical materials have been intensively studied for various quantum features such as Bell inequality violation and anticorrelation. In an interferometric scheme, anticorrelation results from photon bunching based on randomness when entangled photon pairs coincidently impinge on a beam splitter. Compared with post-measurement-based probabilistic confirmation, a coherence version has been recently proposed using the wave nature of photons. Here, the origin of quantum features in a coupled interferometric scheme is investigated using pure coherence optics. In addition, a deterministic method of entangled photon-pair generation is proposed for on-demand coherence control of quantum processing.

scholarly journals Generation of Pure State Photon Triplets in the C-Band

Micromachines ◽  
2019 ◽  
Vol 10 (11) ◽  
pp. 775 ◽  
Author(s):  
Xi-Rong Su ◽  
Yi-Wen Huang ◽  
Tong Xiang ◽  
Yuan-Hua Li ◽  
Xian-Feng Chen
Keyword(s):  
Pure State ◽  
Schmidt Number ◽  
Second Order ◽  
Conversion Process ◽  
Gaussian Filter ◽  
Periodically Poled ◽  
Two Photon ◽  
Parametric Down Conversion ◽  
Photon States ◽  
Down Conversion

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).

Spectral properties of entangled photon pairs generated via quasi-phased-matched spontaneous parametric down-conversion

2015 ◽  
Vol 13 (11) ◽  
pp. 113001-113005 ◽  
Author(s):  
Maopeng Xia Maopeng Xia ◽  
Jianjun Li Jianjun Li ◽  
Youbo Hu Youbo Hu ◽  
Wenyang Sheng Wenyang Sheng ◽  
Dongyang Gao Dongyang Gao ◽  
...  
Keyword(s):  
Spectral Properties ◽  
Photon Pairs ◽  
Parametric Down Conversion ◽  
Entangled Photon Pairs ◽  
Down Conversion
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