Analytical model of backscattering signals in lidars based on complex modulated photon density waves

Area of Science:

• Ocean optics
• Remote sensing
• Laser physics

Background:

• Accurate profiling of optically active substances in seawater is crucial for marine science.
• Traditional lidar methods face limitations in spatial resolution and required probing power.

Purpose of the Study:

• To develop theoretical models for lidar echo signals in seawater using modulated laser pulses and matched detection.
• To enable calculation of elastic backscattering and fluorescence echo signals for improved water quality monitoring.

Main Methods:

• Development of analytical solutions to the radiation transfer equation in the small-angle approximation.
• Modeling of lidar echo signals, including elastic backscattering and fluorescence.
• Verification of the elastic backscattering model using Monte Carlo statistical simulations.

Main Results:

• Validated theoretical models for lidar echo signal analysis in seawater.
• Demonstrated that the developed probing method achieves high spatial resolution comparable to ultrashort pulse lidar.
• Showcased the potential for lower probing power requirements compared to existing methods.

Conclusions:

• The developed lidar probing method offers a promising approach for efficient and high-resolution vertical profiling of marine substances.
• This technique advances remote sensing capabilities for oceanographic research and environmental monitoring.