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  1. Home
  3. High-precision Dsm-based Laser Ranging Method Integrated With Free Space Optical Communication.
  1. Home
  3. High-precision Dsm-based Laser Ranging Method Integrated With Free Space Optical Communication.

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Implementation of a Reference Interferometer for Nanodetection
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High-precision DSM-based laser ranging method integrated with free space optical communication.

Xueyuan Ao, Qirun Fan, Yizhou Wang

    Optics Express
    |November 22, 2024

    View abstract on PubMed

    Summary
    This summary is machine-generated.

    This study introduces an integrated free space optical communication (FSOC) and laser ranging system. The novel method achieves highly accurate distance measurements (∼0.303 mm RMSE) and faster communication rates.

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    Area of Science:

    • Optical Engineering
    • Communication Systems
    • Sensing Technology

    Background:

    • Free space optical communication (FSOC) is rapidly advancing with diverse applications including satellite, UAV, and underwater systems.
    • High-precision position and distance information are crucial in many FSOC applications, often requiring dedicated laser ranging technology.
    • Existing integrated FSOC and laser ranging solutions face limitations in ranging accuracy, typically at the millimeter level.

    Purpose of the Study:

    • To enhance the accuracy of laser ranging and improve the communication rate within an integrated FSOC architecture.
    • To develop a novel method for combining laser ranging with high-speed FSOC to reduce terminal size, weight, and power.
    • To demonstrate a new approach for achieving sub-millimeter ranging precision in integrated optical communication systems.

    Main Methods:

    • Proposed a harmonic phase ranging method integrated with delta-sigma modulation (DSM).
    • Implemented the method on a 10 Gb/s coherent FSOC system.
    • Utilized DSM to convert harmonic signals into digital data for combined transmission with communication data.

    Main Results:

    • Achieved a root mean square error (RMSE) of approximately 0.303 mm for laser ranging.
    • Successfully integrated laser ranging capabilities into a high-speed FSOC link.
    • Demonstrated improved ranging precision compared to existing millimeter-level solutions.

    Conclusions:

    • The proposed harmonic phase ranging method combined with DSM offers superior laser ranging accuracy.
    • The integrated architecture effectively combines high-precision ranging with high-speed FSOC.
    • This approach presents significant advantages for applications requiring both accurate distance measurement and high data rates in optical communication.