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Updated: Jun 20, 2026

Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing
08:54

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Published on: February 13, 2018

Distributed laser Doppler velocimeter.

V Gusmeroli, M Martinelli

    Optics Letters
    |September 25, 2009
    PubMed
    Summary
    This summary is machine-generated.

    A novel laser Doppler velocimeter continuously measures flow velocity profiles. This advanced fluid mechanics tool utilizes coherence-multiplexing for enhanced backscattering Doppler detection in fiber optics.

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    Area of Science:

    • Fluid mechanics
    • Optical instrumentation
    • Laser Doppler velocimetry

    Background:

    • Accurate measurement of flow velocity profiles is crucial in fluid mechanics.
    • Traditional velocimetry methods can be limited in continuous profile recovery.

    Purpose of the Study:

    • To describe a monobeam laser Doppler velocimeter for continuous flow velocity profile recovery.
    • To demonstrate the application of coherence-multiplexing in backscattering Doppler detection.

    Main Methods:

    • Theoretical analysis of a distributed velocimeter.
    • Experimental setup using a superluminescent diode in an all-fiber-optic scheme.
    • Coherence-multiplexing applied to backscattering Doppler detection.

    Main Results:

    • Successful continuous recovery of the flow velocity profile along the beam.
    • Demonstration of water flow velocity profile in a duct.
    • Validation of the velocimeter's capabilities in experimental fluid mechanics.

    Conclusions:

    • The developed monobeam laser Doppler velocimeter offers exceptional capabilities for experimental fluid mechanics.
    • The coherence-multiplexing approach enhances backscattering Doppler detection.
    • This technology enables detailed analysis of fluid flow dynamics.