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Acta Optica Sinica, Volume. 44, Issue 18, 1806002(2024)

Optical Path Synchronization and Co-Phasing Combination Methods Among Spatial Diversity Signals

Yuting Li1,2,3, Jiaying Liu1,2,3, Ziting Pan1,2,3, Ziqiang Li1,2, Chao Geng1,2,3、*, and Xinyang Li1,2,3
Author Affiliations
  • 1Key Laboratory on Adaptive Optics, Chinese Academy of Sciences, Chengdu 610209, Sichuan , China
  • 2Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, Sichuan , China
  • 3University of Chinese Academy of Sciences, Beijing 100049, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (9)
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    References (35)
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    Figures & Tables(9)
    Schematic diagram of optical combination of diversity receiving signals

    Fig. 1. Schematic diagram of optical combination of diversity receiving signals

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    3 dB coupler diagram

    Fig. 2. 3 dB coupler diagram

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    Distribution of output optical intensity

    Fig. 3. Distribution of output optical intensity

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    Changes in combined power and BER within optical path difference range of 0-100 ps. (a) Changes in combined power; (b) changes in BER

    Fig. 4. Changes in combined power and BER within optical path difference range of 0-100 ps. (a) Changes in combined power; (b) changes in BER

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    BER changes with OSNR

    Fig. 5. BER changes with OSNR

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    Normalized received optical intensity J and bit error number statistics of two-channel signal combination. (a) Open loop with phase control; (b) open loop with optical path difference correction; (c) open loop with optical path correction and phase control

    Fig. 6. Normalized received optical intensity J and bit error number statistics of two-channel signal combination. (a) Open loop with phase control; (b) open loop with optical path difference correction; (c) open loop with optical path correction and phase control

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    Signal delay diagram

    Fig. 7. Signal delay diagram

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    Four-channel signal combination normalized received optical intensity J and bit error number statistics

    Fig. 8. Four-channel signal combination normalized received optical intensity J and bit error number statistics

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    • Table 1. Effect of signal optical path difference on BER under co-phasing control

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      Table 1. Effect of signal optical path difference on BER under co-phasing control

      τ /psBERτ /psBER
      3501.05×10-24350
      3603.45×10-74450
      3481.40×10-94550
      3494.75×10-114650
      3502.48×10-124750
      35104761.03×10-12
      35204771.21×10-11
      35504783.19×10-10
      36504802.85×10-8
      37504814.75×10-7
      38504828.31×10-5
      39504901.05×10-4
      40505005.07×10-3
      41505102.58×10-2
      4250––
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    Yuting Li, Jiaying Liu, Ziting Pan, Ziqiang Li, Chao Geng, Xinyang Li. Optical Path Synchronization and Co-Phasing Combination Methods Among Spatial Diversity Signals[J]. Acta Optica Sinica, 2024, 44(18): 1806002

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    Paper Information

    Category: Fiber Optics and Optical Communications

    Received: Nov. 29, 2023

    Accepted: Mar. 18, 2024

    Published Online: Aug. 21, 2024

    The Author Email: Geng Chao (blast_4006@126.com)

    DOI:10.3788/AOS231850

    Topics

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