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Formulation and Acoustic Modulation of Optically Vaporized Perfluorocarbon Nanodroplets

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Blue-green pulsed propagation through fog.

G C Mooradian, M Geller, L B Stotts

|March 9, 2010

Summary

This summary is machine-generated.

This study analyzes blue-green pulsed laser propagation through fog, identifying three energy transport regions. Region II, characterized by forward-directed multiple scattering, is crucial for received signals and exhibits slower decay.

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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

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Published on: March 20, 2017

Area of Science:

Optics and Photonics
Atmospheric Physics
Laser Technology

Background:

Laser light propagation through atmospheric obscurants like fog is critical for optical communication and remote sensing.
Understanding scattering phenomena is essential for predicting signal attenuation and distortion.

Purpose of the Study:

To quantitatively analyze the energy transport of blue-green pulsed laser propagation through fog.
To characterize the distinct regions of energy transport based on scattering lengths.
To provide detailed data on Region II, where multiple scattering is dominant.

Main Methods:

Experimental measurements of blue-green pulsed laser propagation through fog.
Analysis of energy transport based on attenuation lengths (tau).
Identification and characterization of three distinct propagation regions.

Main Results:

Three regions of energy transport were identified: Region I (0 < tau < 13) dominated by direct beam; Region II (13 < tau < 32) by forward-scattered multiple scattering; Region III (tau > 32) by diffusion-type scattering.
Region II exhibits exponential decay at ~2 dB/tau and is the primary contributor to the received signal.
Region II shows minimal spatial, angular, and temporal spreading compared to other regions.

Conclusions:

The study provides quantitative data on Region II of pulsed laser propagation in fog.
Forward-directed multiple scattering in Region II significantly influences received signal characteristics.
Understanding these regions is vital for optimizing laser-based systems operating in foggy conditions.