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Numerical simulation model of an optical filter using an optical vortex.

Yifan Zhou, Xiang Li, Zhenping Yin

    Optics Express
    |October 19, 2022
    PubMed
    Summary
    This summary is machine-generated.

    Optical vortex beams enhance lidar and optical communication by filtering signals. This method spatially separates laser light from background noise, improving detection range and transmission in low signal-to-noise ratio environments.

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    Area of Science:

    • Optics and Photonics
    • Optical Engineering

    Background:

    • Low signal-to-noise ratio (SNR) limits performance in lidar and optical communication.
    • Vortex beams offer a method to spatially separate coherent laser signals from incoherent background light.

    Purpose of the Study:

    • To present a simulation model where optical vortex beams function as an optical filter.
    • To identify key instrument parameters for effective optical filtering using vortex beams.

    Main Methods:

    • Simulation of an optical vortex acting as an optical filter.
    • Analysis of instrument parameters including vortex phase modulation, topological charge, and virtual Fresnel lens focal length.

    Main Results:

    • Demonstrated suppression of background radiation by up to 95% within the spectral filter bandwidth.
    • Retained 97% of the coherent laser signal during the filtering process.
    • Preliminary experimental validation of the simulation model's predictions.

    Conclusions:

    • Optical vortex filtering is a promising technique for enhancing lidar and optical communication systems.
    • The simulation model provides a basis for designing future lidar and communication systems utilizing optical vortex filtering.
    • This method significantly improves signal quality in challenging low SNR conditions.