By John P. Powers
AN advent TO FIBER OPTICS structures, 2/e, is appropriate for college students and execs. The subject matter and key aggressive virtue provided by means of the e-book is its pragmatic method of the learn of fiber optics in communications. The textual content integrates varied components of fiber optics and gives a transparent photograph of ways they're utilized in fiber optics communique. via introducing the terminology utilized in fiber optics, and describing the construction blocks of an optical fiber procedure, Powers' textual content allows scholars to method the preliminary layout of optical hyperlinks, and to appreciate the tradeoffs made in designing and utilizing a fiber optics communique line.
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Extra resources for An Introduction to Fiber Optic Systems
2 presents our estimates of the tr&c on various long-distance networks at the end of 2000. The voice network still dominated, but it will likely be surpassed by the public Internet within a year or two. ) In terms of bandwidth, the Internet is already dominant. However, it is hard to obtain good figures, since, as we discuss later, the bandwidth of Internet backbones jumps erratically. In terms of dollars, though, voice still provides the lion’s share (well over 80%) of total revenues. We concentrate in this chapter (as in our previous papers [CoffmanOl, CoffmanO21) on the growth rates in Internet tr&c, as measured in bytes.
As we explainedin the previous section, the early skepticism about the need for high-capacity optical transport was rooted in the reality of the telecommunications networks. Up until 1990, they were dominated by voice, which was growing slowly. Then, by the mid 1990s, they came to be dominated (in terms of capacity) by private lines, which were growing three or four times as fast. And then, in the late 1990s, they came to be dominated by the Internet, which was growing faster still. Before we go through the analyses for the tr&c growth on the Internet, we must first at least define the Internet and describe its history and structure.
The overwhelmingly predominant view has been that Internet traffic (as measured in bytes received by customers) doubles every 3 or 4 months. 17 OPTICAL FIBER TELECOMMUNICATIONS, VOLUME TVB Copyright 0 2002, Elsevier Scienm (USA). ALI rightsof reproduction in any form reserved. ISBN &12-395173-9 18 Kerry G. Coffman and Andrew M. Odlyzko Such unprecedented rates (corresponding to traffic increasing by factors of between 8 and 16 each year) did prevail within the United States during the crucial 2-year period of 1995 and 1996, when the Internet first burst onto the scene as a major new factor with the potential to transform the economy.
An Introduction to Fiber Optic Systems by John P. Powers
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