9 Next Generation Transmission Systems Enabling Technologies, Architectures, and Performances

9.1 Introduction

In Chapter 6 we have discussed Dense Wavelength Division Multiplexing (DWDM) technologies for implementing high capacity very long reach optical transmission systems.

In that chapter, it has been shown as transmission systems with an overall capacity in excess of 2 Tbit/s and a reach longer than 2000 km can be designed using direct detection and in-line optical amplification.

From the point of view of the product capacity-reach it seems that these figures are sufficient to satisfy the needs of telecom carriers for the time being.

As a matter of fact, the need of a new generation of transmission systems does not emerge from the need ...

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