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Laser & Optoelectronics Progress, Volume. 62, Issue 9, 0900006(2025)

Key Technology and Prospect of Inter-satellite Laser Communication

Haonan Wang1, Junfeng Liu2, Zhuojiang Nan1, and Wei Tao1,3、*
Author Affiliations
  • 1School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
  • 2Shanghai Basic Research Institute of Spaceflight Technology, Shanghai 201109, China
  • 3National Key Laboratory of Advanced Micro and Nano Manufacture Technology, Shanghai 200240, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (6)
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    References (92)
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    Figures & Tables(6)
    Acquisition, pointing, and tracking system block diagram

    Fig. 1. Acquisition, pointing, and tracking system block diagram

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    Laser polarization multiplexing recognition diagram

    Fig. 2. Laser polarization multiplexing recognition diagram

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    Routing link diagrams of inter-satellite laser communication. (a) Constellation built using Systems Tool Kit; (b) fixed link and temporary link comparison

    Fig. 3. Routing link diagrams of inter-satellite laser communication. (a) Constellation built using Systems Tool Kit; (b) fixed link and temporary link comparison

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    Laser/RF fusion network diagram

    Fig. 4. Laser/RF fusion network diagram

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    • Table 1. Comparison of APT technology solutions

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      Table 1. Comparison of APT technology solutions

      IndexGimbal frameOscillating mirrorPeriscopeL-shaped turntable
      Pointing accuracyHighLowMediumHigh
      Volume and weightLargeSmallLargeSmall
      Other advantageLarge-aperture antennaLow temperature control requirementsHigh research value

    • Table 2. Comparison of laser/RF fusion technology

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      Table 2. Comparison of laser/RF fusion technology

      Proposed methodologyDSB-SC/CD［73］RF/FSO communication architecture［75］Scheduling schemes［76］
      Experimental contentCompare with PM/CDCompare with existing systemsAlgorithm performance testing
      ContributionGRF increased by 5.92 dB， SFDR3 increased by 4.36 dB·Hz2/3 and NF decreased by 6.39 dBThroughput increased by 12 Gb/s（optics） and 4 Gb/s（RF）Throughput>125 Mb/s， downlink delay<10 s and PDOP（IGSOs<1.5， MEOs<1）
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    Haonan Wang, Junfeng Liu, Zhuojiang Nan, Wei Tao. Key Technology and Prospect of Inter-satellite Laser Communication[J]. Laser & Optoelectronics Progress, 2025, 62(9): 0900006

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    Paper Information

    Category: Reviews

    Received: Aug. 19, 2024

    Accepted: Oct. 8, 2024

    Published Online: Apr. 14, 2025

    The Author Email: Wei Tao (taowei@sjtu.edu.cn)

    DOI:10.3788/LOP241861

    CSTR:32186.14.LOP241861

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology