Two sub-carriers multiplexed millimeter wave generation using Mach-Zehnder modulators

In order to generate optical millimeter wave signals, two cascaded Mach-Zehnder modulators (MZMs) are utilized. The first MZM modulates electric signals in the form of single side-band. Optical single side-band (OSSB) approach is a method to overcome the fiber chromatic dispersion effect for long distance communications. Two OSSB channels' frequencies are then upgraded to 60 GHz band in the optical domain. RF power adjustment is critical to decrease unwanted harmonics' interference effect. Simulation model is examined for two 60 GHz sub-bands transmission. The study is done for a single mode fiber with attenuation of 0.1 dB/km, and chromatic dispersion factor of 16 ps/(nm·km). Results are presented and the performance of the suggested approach is discussed.