Radio-over-Fiber Dual-Parallel Mach–Zehnder modulator system for photonic generation of Millimeter-Wave signals through two stages

Investigating the Performance of low-cost millimeter wave for long-distance Front haul RoF system based on Pre-distortion & FBG techniques

“…Broad wireless communication, radars, phased-array antennas, contemporary instruments, imaging, medicinal, and terahertz applications are only a few areas where mm-wave signals have been proposed as a potential solution for a laser that is directly or indirectly modulated in a central station (CS) and then transmitted through an optical fiber to a photodiode [3]. This produces (mm-wave), which are then sent to a radio with antennas in the base station (BS) [4]. Due to the dispersion of the propagated signal in the optical link which is increased by increasing the bitrate the system, the nonlinearity become dominant factor that mitigates the performance of fronthaul RoF system, especially when operating at high frequencies (mm-wave) [5].…”

“…Thus, by altering the phase at the phase shift, the phase imbalance may be reduced of dense wavelength division multiplexing radio-over-fiber (DWDM-RoF). [4] Proposed a design of a (mmwave -RoF) access network through two modulation stages for the generation of multiple millimeter wave (mm-wave) signals with frequencies of 20, 40, 60 and 80 GHz for the transmission rate of 10 Gbps as a function of the variation of link distance and signal power. By using two stages first based on dualparallel Mach-Zehnder modulator (DP-MZM) and second contains only one modulator (MZM), connected to three pulse generators: Non-Return-to-Zero (NRZ), Return-to-Zero (RZ) and Gaussian, which were selected individually to each simulation in OptiSystem software.…”