November 2009
Intermediate to advanced
928 pages
26h 5m
English
Content preview from Optical Networks, 3rd Edition
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chapter 5
Transmission System Engineering
OUR GOAL IN THIS CHAPTER is to understand how to design the physical layer of an optical network. To this end, we will discuss the various impairments that we must deal with, how to allocate margins for each of these impairments, how to reduce the effect of these impairments, and finally all the trade-offs that are involved between the different design parameters.
5.1 System Model
Figure 5.1 shows a block diagram of the various components of a unidirectional WDM link. The transmitter consists of a set of DFB lasers, with or without external modulators, one for each wavelength. The signals at the different wavelengths are combined into a single fiber by means of an optical multiplexer. An optical power ...
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