Study of the performance of Coherent Optical -Orthogonal Frequency Division Multiplexing CO-OFDM systems

Abstract

CO-OFDM (Coherent Optical Orthogonal Frequency Division Multiplexing) is a modulation technique crucial for high-speed optical communication, merging OFDM (Orthogonal Frequency Division Multiplexing), a multicarrier transmission method dividing signals into orthogonal subcarriers, with Coherent Detection, which recovers both amplitude and phase using a local oscillator laser, offering key advantages like high spectral efficiency, resistance to chromatic and polarization mode dispersion (PMD), improved sensitivity, and support for advanced modulation formats (QPSK, QAM, etc.) for applications in long-haul and ultra-high-speed optical networks, including 100G/400G Ethernet and beyond