By B.E. Briley

ISBN-10: 0444704981

ISBN-13: 9780444704986

A radical account at the fundamentals of fiber optics procedure layout is contained during this quantity. Introducing the subjects from the vantage aspect of the coed electric engineer, the purpose of the textual content is to educate instead of only current evidence. the general view of the textual content is towards functional engineering issues together with expenses, and a dialogue of radiation results is linked to every one acceptable chapter.

The quantity starts with a historical past of optical communications, resulting in the now extensively practiced box of fiber optics. Comparisons are made to traditional media and strategies: wire-line, coaxial cable, and radio. the character and homes of optical fiber are tested, together with production strategies, and fiber forms and functions. the speculation of sunshine suggestions is brought in steps, starting with a slab waveguide. ideas of Maxwell's equations are derived and defined in view of the atypical nature of the medium. Electro-optic units are tested, together with launching and detecting units. The homes and kinds of those units are explored. specifically, light-emitting diodes, injection laser diodes, p-i-n diodes, and avalanche picture diodes are coated. The digital circuits essential to thoroughly serve the electro-optic units are tested and contrasted with extra traditional types.

Modulation strategies applicable to optical fiber transmission structures are enumerated and in comparison. total approach issues are addressed, and examples are given of varied platforms which were deployed, or are deliberate for deployment. expectancies for destiny advancements and developments within the box are enumerated, with symptoms in their value. subject matters reminiscent of ultra-low-loss fiber and coherent detections concepts are discussed.

Appendices comprising an accounting of precious laboratory apparatus, mathematical family members hired within the physique of the textual content, and whole workout recommendations are integrated.

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Additional info for An Introduction to Fiber Optics System Design

Sample text

5 CHARACTERISTICS 43 2 " INPUT CLADDING PARABOLIC E OUTPUT F I G . 2 - 1 7 . Graded-index fiber. graded-index fiber (see Fig. 2-18). The corresponding bandwidth behavior of typical single-mode fiber as a function of both wavelength and spectral width of the source is shown in Fig. 2-19. Single-mode fiber performance is clearly dependent upon the nature of the illuminating source, and knowledge of this fact is important in interpreting fiber manufacturer data. 5 p s / n m k m from 1285-1330 nm. , D < 20 p s / n m k m at 1550 nm.

ATTENUATION T h e most significant attribute of modern optical fibers is its extremely high transparency (or low attenuation) in certain wavelength ranges. Early fiber was considered excellent if it displayed 10 dB per kilometer attenuation at usable wavelengths. 16 dB per kilometer have been obtained [19]. 5 CHARACTERISTICS 33 RI N CN RE U C I B L ^ ^ ^ ^ ^ ^ m^ ^ ^ ^ ^ ^ s S. ^^^^^^^^ y y/— CLADDING MATERIAL w y y y ^ ^ ; : CORE MATERIAL OUTER CRUCIBLE FIBER READY FOR JACKETING FIG. 2 - 9 . T h e Double-Crucible process.

A parabolic index profile can be shown to be near ideal. The effect of grading is analogous to that experienced in atmospheric transmission over a wide band of radio frequencies as a result of the ionos­ pheric Ε and F layers [34]. The improvement in bandwidth from the use of graded index fiber is pro­ found, typically amounting to two decimal orders of magnitude. This fiber type will be discussed in more detail shortly. 5 CHARACTERISTICS 43 2 " INPUT CLADDING PARABOLIC E OUTPUT F I G . 2 - 1 7 .

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An Introduction to Fiber Optics System Design by B.E. Briley


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