Performance Prediction of 60 GHz Remote Optical Millimeter Wave Generation by Frequency 48 Tupling

In this work, a novel scheme for frequency 48 tupling millimeter wave (mmw) generation using 2 dual parallel Mach–Zehnder modulator (DPMZM) through 2 stage modulation is investigated. When the first DPMZM is biased in maximum transmission point and adjusting the phase difference between the 2 MZM’s, (4n + 2) optical sidebands are generated. In the first stage, ± 6th order optical sidebands beat at the detector and thereby 15 GHz signal for remodulating the second DPMZM is generated. In the second stage, DPMZM-2 acts as quadrupler which generates ± 4n order sidebands. By the suitable choice of modulation index of DPMZM-2 as 1.375, ± 2nd order optical sidebands are enhanced and the other higher order optical sidebands are suppressed. The photodetector beats the ± 24th order sidebands to generate frequency 48 tupling mm wave. Simulation results predict a radio frequency sideband suppression ratio (RFSSR) and optical sideband suppression ratio (OSSR) of 40 and 20 dB is obtained respectively, by considering the practical photodetector parameters.60 GHz mm wave is generated using a very low 1.25 GHz RF signal with a maximum power of − 40 dBm for a fiber length of 20 km when the optical amplifier gain is fixed as 21 dB.