Broadband-laser-diode pumped periodically poled potassium titanyl phosphate-Sagnac polarization-entangled photon source

Cai，Neng1; Cai，Wu Hao1; Wang，Shun1; Li，Fang1; Shimizu，Ryosuke2; Jin，Rui Bo1,3

2022

10.1364/JOSAB.437808

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS   影响因子和分区

0740-3224

1520-8540

We experimentally demonstrate a polarization-entangled photon source at 810 nm using a type-II phase-matched periodically poled potassium titanyl phosphate (PPKTP) crystal pumped by a low-cost, broadband laser diode with a central wavelength of 405 nm and a typical bandwidth of 0.53 nm. The PPKTP crystal is placed in a Sagnac loop to realize the compact size and high stability. The downconverted biphotons, the signal and the idler, have typical bandwidths of 5.57 and 7.32 nm. We prepare two Bell states |9i and |9i with the fidelities of 0.948 ± 0.004 and 0.963 ± 0.002. In the polarization correlation measurement, the visibilities are all higher than 96.2%, and in the Bell inequality test, the S value can achieve 2.78 ± 0.01. This high-quality and low-cost entangled photon source may have many practical applications in quantum information processing.

SCI ; EI

英语

其他

Guangdong Key Laboratory of Quantum Science and Engineering[GKLQSE202102] ; National Natural Science Foundation of China[11704290,12074299,91836102]

Optics

Optics

WOS:000749706400011

OPTICAL SOC AMER

20215211397796

Bandwidth ; Phase matching ; Polarization ; Potassium compounds ; Pumping (laser) ; Quantum entanglement ; Quantum optics

Electronic Circuits:713 ; Information Theory and Signal Processing:716.1 ; Light/Optics:741.1 ; Lasers, General:744.1 ; Atomic and Molecular Physics:931.3 ; Quantum Theory; Quantum Mechanics:931.4

PHYSICS

2-s2.0-85121770694

Scopus

1.Hubei Key Laboratory of Optical Information and Pattern Recognition,Wuhan Institute of Technology,Wuhan,430205,China
2.The University of Electro-Communications,Chofu,1-5-1 Chofugaoka,Tokyo,Japan
3.Guangdong Provincial Key Laboratory of Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Cai，Neng,Cai，Wu Hao,Wang，Shun,et al. Broadband-laser-diode pumped periodically poled potassium titanyl phosphate-Sagnac polarization-entangled photon source[J]. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS,2022,39(1):77-82.

Cai，Neng,Cai，Wu Hao,Wang，Shun,Li，Fang,Shimizu，Ryosuke,&Jin，Rui Bo.(2022).Broadband-laser-diode pumped periodically poled potassium titanyl phosphate-Sagnac polarization-entangled photon source.JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS,39(1),77-82.

Cai，Neng,et al."Broadband-laser-diode pumped periodically poled potassium titanyl phosphate-Sagnac polarization-entangled photon source".JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS 39.1(2022):77-82.