Remote visualization of underwater oil using a flash Raman lidar system

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.