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  • Received: Nov. 20, 2019

    Accepted: Apr. 16, 2020

    Posted: May. 22, 2020

    Published Online: May. 25, 2020

    The Author Email: Qing Zhao (qzhaoyuping@bit.edu.cn), Wenlin Gong (gongwl@siom.ac.cn)

    DOI: 10.3788/COL202018.071101

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    Zijie Li, Qing Zhao, Wenlin Gong. Performance comparison of ghost imaging versus conventional imaging in photon shot noise cases[J]. Chinese Optics Letters, 2020, 18(7): 071101

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Chinese Optics Letters, Vol. 18, Issue 7, 071101 (2020)

Performance comparison of ghost imaging versus conventional imaging in photon shot noise cases

Zijie Li1, Qing Zhao1,*, and Wenlin Gong2,**

Author Affiliations

  • 1Center for Quantum Technology Research, School of Physics, Beijing Institute of Technology, Beijing 100081, China
  • 2Key Laboratory for Quantum Optics and Center for Cold Atom Physics of CAS, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

Abstract

The performances of ghost imaging and conventional imaging in photon shot noise cases are investigated. We define an imaging signal-to-noise ratio called SNRtran where only the object’s transmission region is used to evaluate the imaging quality and it can be applied to ghost imaging (GI) with any random pattern. Both the values SNRGItran of GI and SNRCItran of conventional imaging in photon shot noise cases are deduced from a simple statistical analysis. The analytical results, which are backed up by numerical simulations, demonstrate that the value SNRGItran is related to the ratio between the object’s transmission area Ao and the number density of photons illuminating the object plane Io, which is similar to the theoretical results based on the first principle of GI with a Gaussian speckle field deduced by B. I. Erkmen and J. H. Shapiro [in Adv. Opt. Photonics 2, 405–450 (2010)]. In addition, we also show that the value SNRCItran will be larger than SNRGItran when Ao is beyond a threshold value.

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