The Evolution of Optical Transport Networks

This introductory chapter describes the role of optics in networks, their capabilities, and their scaling limitations (different multiplexing techniques, i. e., (time-division multiplexing), (code-division multiplexing), (frequency-division multiplexing), (space-division multiplexing)). Types of optical networks installed around the globe are summarized, as well as their impact on society, market structure, and future perspectives.