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Remote visualization of underwater oil using a flash Raman lidar system.

T Somekawa, S Kurahashi, S Matsuda

    Optics Letters
    |October 13, 2023
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel underwater monitoring system using flash lidar and Raman spectroscopy to detect oil leaks. The system visualizes underwater oil up to 5 meters with a detection limit of 0.27 mm thickness.

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    Area of Science:

    • Environmental Science
    • Optical Engineering
    • Spectroscopy

    Background:

    • Underwater oil spills pose significant environmental risks.
    • Effective monitoring systems are crucial for timely detection and mitigation.
    • Raman spectroscopy offers a sensitive method for chemical identification.

    Purpose of the Study:

    • To develop and demonstrate a novel underwater monitoring system for oil leak detection.
    • To utilize flash lidar technology integrated with Raman spectroscopy.
    • To establish the detection limits and capabilities of the proposed system.

    Main Methods:

    • Implementation of a flash lidar system with a 532 nm laser.
    • Expansion of the laser beam to illuminate a 15 cm diameter area.
    • Detection and calibration of underwater oil and water Raman images.
    • Estimation of oil thickness detection limit through image calibration.

    Main Results:

    • Successful visualization of underwater oil at a distance of 5 meters.
    • Achieved a detection limit for liquid oil thickness of approximately 0.27 mm.
    • Demonstrated the system's capability for effective underwater oil leak detection.

    Conclusions:

    • The proposed flash lidar-based Raman spectroscopy system is effective for underwater oil monitoring.
    • This technology offers a sensitive and reliable method for detecting oil leaks in marine environments.
    • The system has the potential to significantly improve environmental protection efforts against oil pollution.