By Donald G. Baker
ISBN-10: 9401170002
ISBN-13: 9789401170000
ISBN-10: 9401170029
ISBN-13: 9789401170024
Fiber optics is a transmission procedure that makes use of electric signs to modulate a gentle resource and thereby produce an optical sign proportional to sign. those optical indications include details that's transmitted through a pitcher waveguide to a light-sensitive receiver. Fiber optics has a different virtue over copper networks for a few purposes. the target of this e-book is to discover monomode, instead of multimode, purposes of fiber optics to neighborhood quarter networks (LANs), that have turn into a slightly vital element of this expertise as a result ever-increasing progress of LANs. Monomode fiber optics calls for using coherent mild assets resembling laser diodes, YAGs, and HeNe lasers, to call quite a few. It has a few unique merits over multimode that this article is going to examine in a cursory demeanour. (The author's prior ebook on multimode fiber optics, Fiber Optic layout and functions, released through Reston, will be valuable yet now not essential to aug ment this text.) Monomode (or single-mode) fiber optics is the current path of the country of-the-art as a result of its enhanced functionality. due to the fact that a couple of difficulties existed that restricted the expansion of monomode expertise on the time this publication used to be being written, numerous sections of the textual content may be dedicated to reading the shortcom ings in addition to the functionality merits of this technology.
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Additional info for Monomode Fiber-Optic Design: With Local-Area and Long-Haul Network Applications
Example text
Note that the curves in Fig. 5 are dimensionless; therefore, for cutoff wavelengths, assume other values for predicting attenuation caused by bending loss at other wavelengths. 5 percent. 43 dB/Ian using Eq. 2-32. 8. 2 Fig. 2-5. Graphic representation of Eq. 2-32 (a mm mode attenuation). 6 = multimode attenuation; a sm = single- be considered, primarily because the difference between tactical single-mode networks (military uses) and nuclear reactors (industrial uses) is not so obvious. Tactical networks are not exposed to radiation most of the time but must withstand large impulses of radiation for short periods.
There are some waveguide materials in which bleaching after irradiation reduces the waveguide loss below its original loss before irradiation. 2-6. Radiation effects on B-, po, and Ge-doped waveguide one hour after exposu1"e at 105 rads with OH - present in a 100-ppm concentration. Several waveguides on the market exhibit radiation hardness at various wavelengths. They are not discussed in this text because fast changing fiber-optic technology will result in the text becoming obsolete before publication.
A series of problems is presented here to reinforce the reader's comprehension of the subject matter. REVIEW PROBLEMS 1. 50. Plot the core radius versus wavelength. 2. What is the most desirable wavelength to use for transmission to reduce Rayleigh scattering in silica waveguides? 3. 1. 4. Derive the critical radius of curvature, Reo from Eq. 2-27. 5. 1. 6. What is the most ideal waveguide profile to use at 1670-nm wavelengths? 7. 50? 8. 5 dB/m (convert Np /m); and total round trip time = 20 nsec.
Monomode Fiber-Optic Design: With Local-Area and Long-Haul Network Applications by Donald G. Baker
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