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Related Experiment Video

Updated: Nov 5, 2025

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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Static laser speckle suppression using liquid light guides.

Yanyu Guo, Jiayu Deng, Jiapo Li

    Optics Express
    |May 14, 2021
    PubMed
    Summary
    This summary is machine-generated.

    Liquid light guides effectively suppress laser speckle, overcoming limitations of multimode fibers. This study developed a simulation model and achieved 12% speckle contrast with liquid light guides.

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    Area of Science:

    • Optics and Photonics
    • Biomedical Optics

    Background:

    • Static laser speckle suppression using multimode fibers is limited by the need for very long fibers to achieve adequate speckle contrast.
    • Existing methods face practical challenges in achieving efficient speckle reduction.

    Purpose of the Study:

    • To develop and evaluate an effective method for laser speckle suppression using liquid light guides.
    • To establish a speckle simulation model for liquid light guides to numerically calculate speckle contrast.

    Main Methods:

    • A speckle simulation model for liquid light guides was developed, enabling numerical calculation of speckle contrast.
    • Simulation results were validated against experimental data, analyzing speckle contrast dependence on length and numerical aperture.
    • Different liquid core types within liquid light guides were investigated.

    Main Results:

    • A speckle contrast of 12% was achieved at the end of a 2.4 m liquid light guide.
    • A speckle suppression efficiency of 5 was recorded for the liquid light guide system.
    • Liquid light guides demonstrated more efficient speckle suppression compared to multimode fibers of the same length.

    Conclusions:

    • Liquid light guides offer a more efficient alternative to multimode fibers for static laser speckle suppression.
    • The developed simulation model accurately predicts speckle contrast in liquid light guides.
    • This technique has potential applications where laser speckle reduction is critical.