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Huygens-Fresnel wave-optics simulation of atmospheric optical turbulence and reflective speckle in CO2 differential absorption LIDAR (DIAL)

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Author
Nelson, Douglas H.
Petrin, Roger R.
MacKerrow, Edward P.
Schmitt, Mark J.
Foy, Bernard R.
Koskelo, Aaron C.
McVey, Brian D.
Quick, Charles R.
Porch, William M.
Tiee, Joe J.
Fite, Charles B.
Archuleta, Frank A.
Whitehead, Michael C.
Walters, Donald L.
Date
1999-03
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Abstract
The measurement sensitivity of C02 differential absorption lidar (DIAL) can be affected by a number of different processes. We have previously developed a Huygens-Fresnel wave optics propagation code to simulate the effects of two of these processes: effects caused by beam propagation through atmospheric optical turbulence and effects caused by reflective speckle. Atmospheric optical turbulence affects the beam distribution of energy and phase on target. These effects include beam spreading, beam wander and scintillation which can result in increased shot-to-shot signal noise. In addition, reflective speckle alone has been shown to have a major impact on the sensitivity of C02 DIAL. However, in real DIAL systems it is a combination of these phenomena, the interaction of atmospheric optical turbulence and reflective speckle, that influences the results. In this work, we briefly review a description of our model including the limitations along with previous simulations of individual effects. The performance of our modified code with respect to experimental measurements affected by atmospheric optical turbulence and reflective speckle is examined. The results of computer simulations are directly compared with lidar measurements and show good agreement. In addition, advanced studies have been performed to demonstrate the utility of our model in assessing the effects for different lidar geometries on RMS noise and correlation "size" in the receiver plane.
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
URI
http://hdl.handle.net/10945/52710
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    Wave optics simulation of atmospheric turbulence and reflective speckle effects in CO2 differential absorption LIDAR (DIAL) 

    Nelson, Dougles H.; Petrin, Roger R.; MacKerrow, Edward P.; Schmitt, Mark J.; Quick, Charles R.; Zardecki, Andrew; Porch, William M.; Whitehead, Michael; Walters, Donald L. (Livermore, California. Lawrence Livermore National Laboratory, 1998-04);
    The measurement sensitivity of C02 differential absorption LIDAR (DIAL) can be affected by a number of different processes. We will address the interaction of two of these processes: effects due to beam propagation through ...
  • Thumbnail

    Wave optics simulation of atmospheric turbulence and reflective speckle effects in CO2 lidar 

    Nelson, Douglas H.; Walters, Donald L.; MacKerrow, Edward P.; Schmitt, Mark J.; Quick, Charles R.; Porch, William M.; Petrin, Roger R. (2000-04);
    Laser speckle can influence lidar measurements from a diffuse hard target. Atmospheric optical turbulence will also affect the lidar return signal. We present a numerical simulation that models the propagation of a lidar ...
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    Wave optics simulation of atmospheric turbulence and reflective speckle effects in CO{sub 2} lidar 

    Nelson, Douglas H.; Walters, Donald L.; MacKerrow, Edward P.; Schmitt, Mark J.; Quick, Charles R.; Porch, William M.; Petrin, Roger R. (2000-04-20);
    Laser speckle can influence lidar measurements from a diffuse hard target. Atmospheric optical turbulence will also affect the lidar return signal. We present a numerical simulation that models the propagation of a lidar ...
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