文档介绍：AN INT 0 I
Second dition
On Bell's Photophone . . .
"The ordinary man . . . will find a little difficulty prehending
how sunbeams are to be used. Does Prof. Bell intend to connect
Boston and Cambridge . . . with a line of sunbeams hung on telegraph
posts, and, if so, what diameter are the sunbeams to be . . . ?. . . will
it be necessary to insulate them against the weather . . . ?. . . . . . until
(the public) sees a man going through the streets with a coil of No.
12 sunbeams on his shoulder, and suspending them from pole to
pole, there will be a general feeling that there is something about
Prof. Bell's photophone which places a tremendous strain on human
credulity."
New York Times Editorial, 30 August 1880
Source: International Fiber Optics & Communication, June, 1986, p. 29
This textbook is written for the beginning user of optical fibers munications. My
purposes are . . .
r to introduce the terminology used in optical fibers,
r to describe the building blocks of an optical fiber system,
a to facilitate the initial first-order design of optical links, and
I r to provide an entry to the research literature of optical fiber ponents.
As a result, the book is more pragmatic than most texts on fiber optics. Few derivations of formu-
las are given; the formulas are introduced to support design applications and to aid the reader's
understanding of the physical phenomena being described. Detailed discussion of advanced topics
is left for more advanced texts and the research literature.
The assumed prerequisites are (1) an introductory knowledge of the ic theory
of waveguides (especially the existence of modes in waveguides, mode cutoff, the concepts of
phase and group velocity, as well as reflection and refraction at an interface), (2) an introduction
munications theory (especially amplitude modulation, pulse modulation, data rate, and
bandwidth concepts), and (3) fundamentals of electronics (includin