YU Si-yuan, LIU Jian-feng, ZHANG Guang-yu, MA Jing, TAN Li-ying. Theoretical study of single-photon acquisition based on Laguerre-Gaussian beams[J]. Journal of Applied Optics, 2008, 29(2): 298-302.
Citation: YU Si-yuan, LIU Jian-feng, ZHANG Guang-yu, MA Jing, TAN Li-ying. Theoretical study of single-photon acquisition based on Laguerre-Gaussian beams[J]. Journal of Applied Optics, 2008, 29(2): 298-302.
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Theoretical study of single-photon acquisition based on Laguerre-Gaussian beams

  • National Key Laboratory of Tunable Laser Technology,Harbin Institute of Technology,Harbin 150001,China

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    YU Si-yuan

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  • The expressions of single-photon acquisition probability in free-space quantum key distribution were deduced based on TEM10 mode Laguerre-Gaussian beams. The single-photon acquisition was analyzed for the laser link between a ground station and a satellite in a low earth orbit. The results show that single-photon can be acquired by the receiver in the satellite with maximum probability if highly attenuated laser pulses based on TEM10 mode Laguerre-Gaussian beams are used as single-photon sources and a bright precursor reference pulse is used to set a short time window for the single-photon acquisition. Unlike the fundamental-mode Gaussian beam, the TEM10 mode Laguerre-Gaussian beam does not cause the single-photon acquisition probability losses due to the movement of satellites.
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