Direct Detection Of Optical Signals In The Presence Of Atmospheric Turbulence PDF Download
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Author | : James Nicholas Bucknam |
Publisher | : |
Total Pages | : 184 |
Release | : 1969 |
Genre | : |
ISBN | : |
Download Direct Detection of Optical Signals in the Presence of Atmospheric Turbulence Book in PDF, ePub and Kindle
Author | : Michael W. Fitzmaurice |
Publisher | : |
Total Pages | : 196 |
Release | : 1971 |
Genre | : Atmospheric chemistry |
ISBN | : |
Download Experimental Investigations of Optical Propagation in Atmospheric Turbulence Book 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.
Author | : James L. Hayes |
Publisher | : |
Total Pages | : 58 |
Release | : 1966 |
Genre | : Atmospheric turbulence |
ISBN | : |
Download Experimental Measurement of Optical Angular Deviation Caused by Atmospheric Turbulence and Refraction Book in PDF, ePub and Kindle
Author | : William F. McDonnell |
Publisher | : |
Total Pages | : 236 |
Release | : 1975 |
Genre | : |
ISBN | : |
Download Considerations in Atmospheric Direct Detection Optical Communications Book in PDF, ePub and Kindle
Author | : Dennis Akitoshi Ohori |
Publisher | : |
Total Pages | : 198 |
Release | : 1968 |
Genre | : Atmospheric turbulence |
ISBN | : |
Download Detection of Signals in the Turbulent Atmospheric Optical Channel Book in PDF, ePub and Kindle
Author | : R. V. Shack |
Publisher | : |
Total Pages | : 45 |
Release | : 1967 |
Genre | : Atmospheric turbulence |
ISBN | : |
Download Interaction of an Optical System with the Incoming Wavefront in the Presence of Atmospheric Turbulence Book in PDF, ePub and Kindle
Author | : G. R. Ochs |
Publisher | : |
Total Pages | : 56 |
Release | : 1974 |
Genre | : Atmospheric turbulence |
ISBN | : |
Download Development of a Ground-based Optical Method for Measuring Atmospheric Turbulence Aloft Book in PDF, ePub and Kindle
Author | : Jack Smith |
Publisher | : |
Total Pages | : 18 |
Release | : 1979 |
Genre | : |
ISBN | : |
Download Atmospheric Turbulence Effects on the Temporal Spectral Densities of Optical Signals Book in PDF, ePub and Kindle
This summary report describes the major efforts and results obtained during the contract period. The objectives were to extend the applicability of optical methods of crosswind sensing to obtain operation under strong turbulence conditions, and to investigate the effects of motion on the optical speed measurement. Two optical windspeed instruments designed to be unaffected by strong turbulence were built and tested. One design was based on the measurement on the time delay required to obtain a peak in the crosscorrelation function derived from intensity fluctuations, and the second design was based on fluctuations of the beam angle of arrival. Both instruments were tested over 2 km paths and the operation was unaffected by increasing turbulent strength. An instrument, using an optical beam and spatial filters at the transmitter and receiver, was built to demonstrate the feasibility of the technique to profile corsspath windspeeds along the beam. The device was tested to path lengths of 500 m and operated satisfactorily. A study was conducted on the errors produced in an optical wind speed measurement due to motion of the receiver and/or beam source. (Author).
Author | : Chii-Feng Ouyang |
Publisher | : |
Total Pages | : |
Release | : 1981 |
Genre | : |
ISBN | : |
Download The Effects of Atmospheric Turbulence on the Atmospheric Transmittance at Optical Frequencies Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : |
Release | : 2004 |
Genre | : |
ISBN | : |
Download Techniques to Mitigate the Effects of Atmospheric Turbulence on Free Space Optical Communication Links Book in PDF, ePub and Kindle