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    High-speed free-space optical continuous-variable quantum key distribution enabled by three-dimensional multiplexing

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    oe-25-7-7919.pdf
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    FInal Published Version
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    Author
    Qu, Zhen cc
    Djordjevic, Ivan B. cc
    Affiliation
    Univ Arizona, Dept Elect & Comp Engn
    Issue Date
    2017-03-28
    
    Metadata
    Show full item record
    Publisher
    OPTICAL SOC AMER
    Citation
    High-speed free-space optical continuous-variable quantum key distribution enabled by three-dimensional multiplexing 2017, 25 (7):7919 Optics Express
    Journal
    Optics Express
    Rights
    © 2017 Optical Society of America
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    A high-speed four-state continuous-variable quantum key distribution (CV-QKD) system, enabled by wavelength-division multiplexing, polarization multiplexing, and orbital angular momentum (OAM) multiplexing, is studied in the presence of atmospheric turbulence. The atmospheric turbulence channel is emulated by two spatial light modulators (SLMs) on which two randomly generated azimuthal phase patterns yielding Andrews' spectrum are recorded. The phase noise is mitigated by the phase noise cancellation (PNC) stage, and channel transmittance can be monitored directly by the D.C. level in our PNC stage. After the system calibration, a total SKR of > 1.68 Gbit/s can be reached in the ideal system, featured with lossless channel and free of excess noise. In our experiment, based on commercial photodetectors, the minimum transmittances of 0.21 and 0.29 are required for OAM states of 2 (or -2) and 6 (or -6), respectively, to guarantee the secure transmission, while a total SKR of 120 Mbit/s can be obtained in case of mean transmittances. (C) 2016 Optical Society of America
    Note
    Open access journal.
    ISSN
    1094-4087
    PubMed ID
    28380909
    DOI
    10.1364/OE.25.007919
    Version
    Final published version
    Sponsors
    Office of Naval Research (ONR) MURI program [N00014-13-1-0627]
    Additional Links
    https://www.osapublishing.org/abstract.cfm?URI=oe-25-7-7919
    ae974a485f413a2113503eed53cd6c53
    10.1364/OE.25.007919
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    UA Faculty Publications

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