Author : R. F. Lutomirski
Publisher :
ISBN 13 :
Total Pages : 19 pages
Book Rating : 4.:/5 (731 download)
Book Synopsis On the Phase Structure and Mutual Coherence Function of an Optical Wave in a Turbulent Atmosphere by : R. F. Lutomirski
Download or read book On the Phase Structure and Mutual Coherence Function of an Optical Wave in a Turbulent Atmosphere written by R. F. Lutomirski and published by . This book was released on 1971 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present work shows that the most commonly used expression for the mutual coherence function (MCF) for an optical wave propagating in a turbulent atmosphere is, in general, incorrect. This expression is based on an unphysical extrapolation of the Kolmogorov spectrum. Along an atmospheric path, with specified turbulence parameters, the new MCF is shown to imply greater resolution, less beam spreading, and greater heterodyne signal-to-noise ratios than indicated by previous calculations. By comparing these results with those previously obtained for heterodyne detection, the percentage errors in the previous calculations are shown to increase with decreasing propagation paths. In particular, where it was formerly thought that the atmosphere limited the effective coherent detection size in heterodyne detection at all ranges, the present calculation reveals that over sufficiently short paths, there is no size limit imposed by the atmosphere. (Author).