Advance Transceiver Mechanisms Enabling FOAN

The FOANFuture Optical Access Network (FOAN) is expected to address issues related to ever-increasing subscriber and bandwidth demand in order to take advantage of future access network services and applications. For FOANFuture Optical Access Network (FOAN) implementation, it is necessary to look beyond On-Off Keying (OOKON-OFF Keying (OOK)) intensity modulation (IMIntensity Modulator (IM)) schemes. FOANFuture Optical Access Network (FOAN) will be flexible, scalable, and reliable as a result of modularization and softwarization. The incorporation of digital signal processing (DSP) concepts as well as multidimensional, coherent modulation and demodulation techniques such as orthogonal frequency division multiplexing (OFDM), in-phase quadrature (IQ) modulators, optical code division multiplexing (OCDM), pulse amplitude modulationAmplitude Modulation (AM) (PAM), and phase shift keying (PSKPhase-Shift Keying (PSK))-based modulation schemes will demonstrate a cost-effective yet flexible solution for FOANFuture Optical Access Network (FOAN). The article will discuss and describe the transceiver mechanisms that support 50/100/200/500/800 Gbps data rates, as well as software-defined (SD) transceivers. This chapter will discuss cost-effective transceiver strategies such as wavelength reuse, colorless ONUs, and others that will be attractive options for implementing upstream transmitters.