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Title: Superior signal persistence of circularly polarized light in polydisperse, real-world fog environments

Abstract

Here, we present simulation results quantitatively showing that circularly polarized light persists in transmission through several real-world and model fog environments better than linearly polarized light over broad wavelength ranges from the visible through the infrared. We present results for polydisperse particle distributions from realistic and measured fog environments, comparing the polarization persistence of linear and circular polarization. Using a polarization-tracking Monte Carlo program, we simulate polarized light propagation through four MODTRAN fog models (moderate and heavy radiation fog and moderate and heavy advection fog) and four real-world measured fog particle distributions (Garland measured radiation and advection fogs, Kunkel measured advection fog, and Sandia National Laboratories’ Fog Facility’s fog). Simulations were performed for each fog environment with wavelengths ranging from 0.4 to 12 µm for increasing optical thicknesses of 5, 10, and 15 (increasing fog density or sensing range). Circular polarization persists superiorly for all optical wavelength bands from the visible to the long-wave infrared in nearly all fog types for all optical thicknesses. Throughout our analysis, we show that if even a small percentage of a fog’s particle size distribution is made up of large particles, those particles dominate the scattering process. In nearly all real-world fog situations, thesemore » large particles and their dominant scattering characteristics are present. Larger particles are predominantly forward-scattering and contribute to circular polarization’s persistence superiority over broad wavelength ranges and optical thicknesses/range. Circularly polarized light can transmit over 30% more signal in its intended state compared to linearly polarized light through real-world fog environments. This work broadens the understanding of how circular polarization persists through natural fog particle distributions with natural variations in mode particle radius and single or bimodal characteristics.« less

Authors:
 [1];  [1];  [1];  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1457523
Alternate Identifier(s):
OSTI ID: 1457503
Report Number(s):
SAND-2018-6691J
Journal ID: ISSN 1559-128X; APOPAI; 664618
Grant/Contract Number:  
AC04-94AL85000; NA0003525
Resource Type:
Accepted Manuscript
Journal Name:
Applied Optics
Additional Journal Information:
Journal Volume: 57; Journal Issue: 19; Journal ID: ISSN 1559-128X
Publisher:
Optical Society of America
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 47 OTHER INSTRUMENTATION; scattering; polarization; atmospheric scattering; multiple scattering; turbid media; aerosols; aerosol and cloud effects

Citation Formats

van der Laan, John D., Wright, Jeremy Benjamin, Kemme, Shanalyn A., and Scrymgeour, David A. Superior signal persistence of circularly polarized light in polydisperse, real-world fog environments. United States: N. p., 2018. Web. doi:10.1364/AO.57.005464.
van der Laan, John D., Wright, Jeremy Benjamin, Kemme, Shanalyn A., & Scrymgeour, David A. Superior signal persistence of circularly polarized light in polydisperse, real-world fog environments. United States. doi:10.1364/AO.57.005464.
van der Laan, John D., Wright, Jeremy Benjamin, Kemme, Shanalyn A., and Scrymgeour, David A. Fri . "Superior signal persistence of circularly polarized light in polydisperse, real-world fog environments". United States. doi:10.1364/AO.57.005464. https://www.osti.gov/servlets/purl/1457523.
@article{osti_1457523,
title = {Superior signal persistence of circularly polarized light in polydisperse, real-world fog environments},
author = {van der Laan, John D. and Wright, Jeremy Benjamin and Kemme, Shanalyn A. and Scrymgeour, David A.},
abstractNote = {Here, we present simulation results quantitatively showing that circularly polarized light persists in transmission through several real-world and model fog environments better than linearly polarized light over broad wavelength ranges from the visible through the infrared. We present results for polydisperse particle distributions from realistic and measured fog environments, comparing the polarization persistence of linear and circular polarization. Using a polarization-tracking Monte Carlo program, we simulate polarized light propagation through four MODTRAN fog models (moderate and heavy radiation fog and moderate and heavy advection fog) and four real-world measured fog particle distributions (Garland measured radiation and advection fogs, Kunkel measured advection fog, and Sandia National Laboratories’ Fog Facility’s fog). Simulations were performed for each fog environment with wavelengths ranging from 0.4 to 12 µm for increasing optical thicknesses of 5, 10, and 15 (increasing fog density or sensing range). Circular polarization persists superiorly for all optical wavelength bands from the visible to the long-wave infrared in nearly all fog types for all optical thicknesses. Throughout our analysis, we show that if even a small percentage of a fog’s particle size distribution is made up of large particles, those particles dominate the scattering process. In nearly all real-world fog situations, these large particles and their dominant scattering characteristics are present. Larger particles are predominantly forward-scattering and contribute to circular polarization’s persistence superiority over broad wavelength ranges and optical thicknesses/range. Circularly polarized light can transmit over 30% more signal in its intended state compared to linearly polarized light through real-world fog environments. This work broadens the understanding of how circular polarization persists through natural fog particle distributions with natural variations in mode particle radius and single or bimodal characteristics.},
doi = {10.1364/AO.57.005464},
journal = {Applied Optics},
number = 19,
volume = 57,
place = {United States},
year = {2018},
month = {6}
}

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