Experiments for Laser Beam Propagation Through Optical Turbulence - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Experiments for Laser Beam Propagation Through Optical Turbulence write by Angel Fernandez. This book was released on 2016. Experiments for Laser Beam Propagation Through Optical Turbulence available in PDF, EPUB and Kindle. Atmospheric turbulence, generated by a differential temperature between the Earth's surface and the atmosphere, causes effects on optical waves that have been of great interest to scientists for many years. Wave front distortions in the optical wave induced by atmospheric turbulence result in a spreading of the beam beyond that due to pure diffraction, random variations of the position of the beam centroid, and a random redistribution of the beam energy within a cross section of the beam leading to irradiance fluctuations. Those effects have far-reaching consequences on astronomical imaging, free space optics (FSO) communications, remote sensing, laser satellite communication, astronomical imaging, adaptive optics, target designation, hyperspectral LiDAR, and other applications that require the transmission of optical waves through the atmosphere. Throughout this thesis, we introduce a globally concept of turbulence, focusing in atmospheric turbulence.Diverse experiments have been carried out, for instance, the propagation of two parallel thin beams under geometrical optics condition for studying the parameters of optical turbulence, and besides, the same optical configuration was used to investigate the best sampling rate for optical turbulence. Furthermore, we have measured evapotranspiration by remote sensing, in which we have heeded the fluctuations of the refractive index through the intensities of the turbulence. Finally, experiments which involve a new beam are also developed, such as phase-flipped Gaussian beam. This beam shows an experimental reduction on its irradiance fluctuations induced by the turbulence, which means that it has a high performance in optical communications. The experimental reduction aforementioned is proved through the comparison with the theory developed.
Experimental Investigations of Optical Propagation in Atmospheric Turbulence
Experimental Investigations of Optical Propagation in Atmospheric Turbulence - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Experimental Investigations of Optical Propagation in Atmospheric Turbulence write by Michael W. Fitzmaurice. This book was released on 1971. Experimental Investigations of Optical Propagation in Atmospheric Turbulence available in PDF, EPUB and Kindle. The pertinent theoretical background and the results of a group of experiments conducted over 0.4- and 1.17-km near-ground horizontal ranges are presented. (1) The log-amplitude variances for HeNe (0.633 μm) and CO2 (10.6 μm) laser beams were found to have a ratio of 26.8, which is in close agreement with the predictions of Rytov-based spherical-wave theory. (2) Published measurements of the saturation level of the log-amplitude variance are reviewed and several inconsistencies noted. (3) The spatial correlation function of irradiance field was measured and found to agree with theory. The degree of correlation between different frequency beams which had traversed the same optical path was also measured and compared to theory. The data exhibited an unacceptably large scatter and did not show the wavelength dependence. (4) The log-normal, Rayleigh, and Rice probability distributions are discussed in terms of their applicability to irradiance statistics. Relatively weak 10.6 μm irradiance fluctuations were found to be equally well described by the log-normal and Rice distributions; strong fluctuations obtained at 0.488 μm were clearly best described by the log-normal distribution.
Laser Beam Propagation in the Atmosphere
Laser Beam Propagation in the Atmosphere - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Laser Beam Propagation in the Atmosphere write by Hugo Weichel. This book was released on 1990. Laser Beam Propagation in the Atmosphere available in PDF, EPUB and Kindle.
Optical Waves and Laser Beams in the Irregular Atmosphere
Optical Waves and Laser Beams in the Irregular Atmosphere - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Optical Waves and Laser Beams in the Irregular Atmosphere write by Nathan Blaunstein. This book was released on 2017-09-22. Optical Waves and Laser Beams in the Irregular Atmosphere available in PDF, EPUB and Kindle. The book introduces optical wave propagation in the irregular turbulent atmosphere and the relations to laser beam and LIDAR applications for both optical communication and imaging. It examines atmosphere fundamentals, structure, and content. It explains specific situations occurring in the irregular atmosphere and for specific natural phenomena that affect optical ray and laser beam propagation. It emphasizes how to use LIDAR to investigate atmospheric phenomena and predict primary parameters of the irregular turbulent atmosphere and suggests what kinds of optical devices to operate in different atmospheric situations to minimize the deleterious effects of natural atmospheric phenomena.
Laser Beam Propagation Through Random Media
Laser Beam Propagation Through Random Media - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Laser Beam Propagation Through Random Media write by Larry C. Andrews. This book was released on 1998. Laser Beam Propagation Through Random Media available in PDF, EPUB and Kindle. Very Good,No Highlights or Markup,all pages are intact.
