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21 August 2014 The polarization maintaining and polarization-basis calibrating in the free-space quantum communication system
Qing Zhang, Yongmei Huang, Jigang Ren
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Proceedings Volume 9283, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Design, Manufacturing, and Testing of Micro- and Nano-Optical Devices and Systems; 92830P (2014) https://doi.org/10.1117/12.2068045
Event: 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2014), 2014, Harbin, China
Abstract
Free-Space Quantum Communication(FSQC) based on the BB84(Bennett-Brassard 1984) protocol makes use of two groups of conjugate basis polarized photon as the carriers of information to realize the communication between a satelits and a group station. Polarization would show some problems like the contrast of polarization to be worser and the polarization-basis unmatched when transfering. In order to achieve the BB84 protocol, ground station needed to track and calibrate for the polarization zero direction of the satellite equipments. So the polarization maintaining and polarization-basis calibrating is one of the key technologies of the FSQC system. Firstly, this paper established the mathematical model of polarization in the FSQC system, and then derived the mathematical relation between the contrast of polarization and the phase delay in theory. Some proposals of Optical System designs have been suggested in the paper. Finally the problem of dynamic polarization-basis in the satellite-ground link had been analysed and the dynamic characteristic of the deviation angle of polarization-basis in this paper.
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Qing Zhang, Yongmei Huang, and Jigang Ren "The polarization maintaining and polarization-basis calibrating in the free-space quantum communication system", Proc. SPIE 9283, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Design, Manufacturing, and Testing of Micro- and Nano-Optical Devices and Systems, 92830P (21 August 2014); https://doi.org/10.1117/12.2068045
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KEYWORDS
Polarization
Satellites
Quantum communications
Calibration
Quantum information
Telecommunications
Ground-based vicarious calibration of satellites
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