Optical Channels: Fibers, Clouds, Water, and the Atmosphere by Sherman Karp, Robert M. Gagliardi, Steven E. Moran, Lawrence

By Sherman Karp, Robert M. Gagliardi, Steven E. Moran, Lawrence B. Stotts

When we have been first approached through Dr. fortunate to write down this ebook we have been very passionate about the possibility, in view that we had meditated an analogous venture for relatively your time. the trouble lay in how most sensible to digest the titanic quantity of information on optical propagation, lessen it to a e-book of possible measurement, and at the same time shape the transition from the physics of propagation to the engineering of optical channels. this is often the motive of Optical Channels. In achieving our aim it used to be essential to condense the fabric on optical propagation and, in so doing, we've got left a great amount to be dealt with through references. we have now attempted to make those judgements in a constant demeanour in order that the publication should be uniform in its remedy of this subject. We determine 4 channels for attention: the free-space channel, which: is attribute of a tranquil surroundings or a space-to-space hyperlink; the turbulent channel, that's attribute of the atmospheric channel; the scatter channel in kinds, clouds and water; and the fiber optic channel. for every of those channels we've attempted to minimize the acceptable propagation concept to a degree that may be used for engineering layout. This has been performed by way of instance, yet right here back judgements needed to be made on which examples to give. we haven't attempted to give any fabric on optical elements and as a result different references on engineering will be essential to complement this book.

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Extra info for Optical Channels: Fibers, Clouds, Water, and the Atmosphere

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9. A. Ben-Shalom, A. D. Devir, and S. G. Lirson, Infrared spectral radiance of the sky, Opt. Eng. 22, 460-463 (1983). 10. W. K. Pratt, Laser Communications Systems, John Wiley and Sons, New York (1969). 11. R. C. 1 to 100 microns, Appl. Opt. 1, 465-471 (1962). 12. I. L. S. Army Signal Research and Development Laboratory Report 2231, AD-266-790 (September, 1961). 2 Coherence Theory and Random Channels In this chapter we will introduce the concept of field coherence, which is necessary to describe fully the propagation of electromagnetic fields in both free space and nonvacuous channels.

6) Notice that once again the received mutual coherence function separates into temporal and spatial components. 6). < 5 l We will make two observations. 8) 44 Chapter 2 Notice that Ca [ ( t - R/ c), T] is implicitly dependent on the time separately and the carrier frequency w+. The variations are assumed small enough to be neglected in the analysis. When the temporal portion of the field is deterministic, with frequency responsefs(w), as is usually the case in communications systems, X(w_, T) takes the form and it called the signal ambiguity function.

C. 1 to 100 microns, Appl. Opt. 1, 465-471 (1962). 12. I. L. S. Army Signal Research and Development Laboratory Report 2231, AD-266-790 (September, 1961). 2 Coherence Theory and Random Channels In this chapter we will introduce the concept of field coherence, which is necessary to describe fully the propagation of electromagnetic fields in both free space and nonvacuous channels. In particular, the ideas of temporal and spatial coherence will be presented together with the concept of the mutual coherence function.

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