查看文章

This chapter provides a taxonomy of optical modulation formats along with experimental techniques for realizing them. High-speed optical transmission systems are increasingly building on digital signal processing and digital communication techniques that are well established in radio- frequency (RF) communication systems, including efficient forward error connection (FEC), advanced modulation, line coding, polarization multiplexing, digital signal processing at both transmitter and receiver, and coherent detection. Nevertheless, an optically routed network exhibits important fundamental as well as technological differences from an RF system, and not all techniques that have proven successful in RF communication should be expected to work well for optical networks. The chapter makes clear the substantial distinctions between design conditions for optical and RF applications, namely, the …