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Fiber Optics, Second Edition by Edward A. Lacy, Robert J. Hoss

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4 Optical Fibers

An optical fiber is a thin, flexible thread of transparent plastic or glass that carries visible light or invisible (near-infrared) radiation. Proper choice of this fiber is vital in fiber-optic system design, as the fiber establishes (1) an upper limit to system bandwidth, and (2) transmitter-to-receiver or transmitter-to-repeater spacing.

Fiber splicing and connections are discussed in Chapter 5; fiber testing is discussed in Chapter 8. Details of fiber and fiber cable manufacture are not given as technicians are not expected to make their own fiber-optic cables.

4.1 Physical Description

4.1.1 Fiber Construction

As shown in Fig. 4.1, an optical fiber consists of a central cylinder or core surrounded by a layer of material ...

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