Flexgrid technology is now considered to be a promising solution for future high-speed
network design. In this context, we need a tutorial that covers the key aspects of elastic …

Orthogonal frequency-division multiplexing (OFDM) is a modulation technology that has
been widely adopted in many new and emerging broadband wireless and wireline …

Rigid fixed-grid wavelength division multiplexing (WDM) optical networks can no longer
keep up with the emerging bandwidth-hungry and highly dynamic services in an efficient …

The rapid growth in communications and internet has changed our way of life, and our
requirement for communication bandwidth. Optical networks can enable us to meet the …

This chapter discusses the changes in technology option or design to support the elastic
concept in an optical network. Next, it introduces in detail some practical aspects of the …

Efficiency in energy consumption is attracting greater and greater attention in recent years to
the point that it is becoming one of the major constraints steering the evolution of our society …

In this paper, we examine how typical transmission systems can be made tunable in
datarate, up to 100 Gb/s, through modulation-format versatility. We investigate through …

This chapter reviews the basics of Dense Wavelength Division Multiplexing (DWDM) and
shows how this will be superseded by a more flexible use of the optical fibre spectrum …

In the last years, the migration from 10 to 40/100 Gbps networks has been proposed as a
solution to increase the capacity of transparent optical networks. Initially, the replacement of …

The thermal noise of photodiode detectors has a substantial impact on the performance of
optical amplifiers in optical fiber communication systems. The presence of thermal noise at …