
2
Advanced optical modulation formats
Peter J. Winzer and Rene´-Jean Essiambre
Bell Laboratories, Alcatel-Lucent, Holmdel, NJ, USA
2.1 INTRODUCTION
Since the publication of the fourth volume of the book series Optical Fiber
Telecommunications in 2002, high-speed optical transmission systems have
increasingly been building on techniques that are well established in radio-
frequency (RF) communication systems, and in particular in wireless communication.
Examples are advanced modulation formats, line coding, enhanced forward error
correction (FEC), and digital signal processing at transmitter and receiver.
The adoption and extension of these techniques