Photonics-aided Multi-subcarrier Phase-insensitive/Sensitive PAM-4 Multiplexing Wireless Transmission System at 100 GHz

We demonstrate 46 Gb/s 4-subcarrier PAM-4 signals generation and THz wave wireless transmission at 100-GHz, enabled by intensity modulation and heterodyne coherent detection. A comprehensive comparison of phase-insensitive scheme and phase-sensitive scheme is investigated. The simulation results show that the phase-sensitive scheme has a 5.5 dB received optical power sensitivity improvement and 1.8 dB input optical power into photodiode (PD) sensitivity improvement compared with phase-insensitive scheme.