A Multi-Carrier Signals Generation Based on DPMZM In Parallel for THz Communication system

In this paper, a multi-carrier THz signals generation scheme is proposed and demonstrated. The scheme is based on DPMZM (dual-parallel Mach-Zehnder modulator) in parallel and recirculating frequency shifter (RFS). By optimizing all the sub-modulators embedded in the RFS, the multi-carrier signals with double frequency interval are generated. A theoretical analysis and simulation experiment is developed, the scheme can generate 20 carriers with 0.1THz frequency interval, and the side-mode suppression ratio (SMSR) is over 25dB.