All-fiber telecom band energy-time entangled biphoton source

Yuting Liu; Junjie Xing; Zhiguang Xia; Run'ai Quan; Huibo Hong; Tao Liu; Shougang Zhang; Xiao Xiang; Ruifang Dong

doi:10.3788/COL202321.032701

Journals >Chinese Optics Letters >Volume 21 >Issue 3 >Page 032701 > Article

Chinese Optics Letters
Vol. 21, Issue 3, 032701 (2023)

All-fiber telecom band energy-time entangled biphoton source | Editors' Pick

Yuting Liu^1,2, Junjie Xing^1,2, Zhiguang Xia^1,2, Run'ai Quan¹..., Huibo Hong^1,2, Tao Liu^1,2, Shougang Zhang^1,2, Xiao Xiang^1,* and Ruifang Dong^1,2,**|Show fewer author(s)

Author Affiliations

¹Key Laboratory of Time and Frequency Primary Standards, National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China

²School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, China

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DOI: 10.3788/COL202321.032701 Cite this Article Set citation alerts

Yuting Liu, Junjie Xing, Zhiguang Xia, Run'ai Quan, Huibo Hong, Tao Liu, Shougang Zhang, Xiao Xiang, Ruifang Dong, "All-fiber telecom band energy-time entangled biphoton source," Chin. Opt. Lett. 21, 032701 (2023) Copy Citation Text

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Abstract

We report an all-fiber telecom-band energy-time entangled biphoton source with all physical elements integrated into a compact cabinet. At a pump power of 800 µW, the photon pairs generation rate reaches 6.9 MHz with the coincidence-to-accidental ratio (CAR) better than 1150. The long-term stability of the biphoton source is characterized by measuring the Hong–Ou–Mandel interference visibility and CAR within a continuous operation period of more than 10 h. Benefiting from the advantages of compact size, light weight, and high stability, this device provides a convenient resource for various field turnkey quantum communication and metrology applications.

Keywords

all-fiber biphoton source energy–time entanglement Hong–Ou–Mandel interference