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Absorption, scattering, and optical turbulence in natural waters
Applied Optics
|October 18, 2022
Summary
Optical turbulence in natural waters causes significant light attenuation, comparable to absorption and scattering. This research quantifies turbulence effects, aiding underwater imaging and sensing systems.
Area of Science:
- Optics
- Fluid dynamics
- Remote sensing
Background:
- The Beer-Lambert-Bouguer law describes light attenuation by absorption and scattering.
- Optical turbulence in natural waters can cause significant local attenuation of light.
- Existing models do not fully integrate turbulence effects with absorption and scattering.
Purpose of the Study:
- To incorporate optical turbulence effects into light attenuation models for natural waters.
- To develop an expression for the turbulence-induced local attenuation coefficient.
- To compare the impact of turbulence, absorption, and scattering across different water types.
Main Methods:
- Developed an expression for the turbulence-induced local attenuation coefficient for Gaussian beams.
- Analyzed the dependence of attenuation on wavelength, beam width, and propagation distance.
- Compared turbulence effects with absorption and scattering for various Jerlov water types.
Main Results:
- Underwater optical turbulence can induce light attenuation quantitatively comparable to absorption.
- Turbulence effects vary with water type, wavelength, and propagation distance.
- The developed model provides a framework for understanding combined attenuation factors.
Conclusions:
- Optical turbulence is a significant factor in underwater light attenuation, on par with absorption.
- This study provides a quantitative comparison of turbulence, absorption, and scattering effects.
- Findings will enhance the design and diagnostics of underwater optical systems for imaging, sensing, and communication.
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