Experimental Characterization of a WR3-Coupled Photodiode Transmitter for High-Speed Terahertz Wireless Communication

We analyze the system performance of a large bandwidth photonic THz transmitter based on a WR3 coupled photodiode. Employing probabilistic constellation shaping (PCS) alongside a 64-QAM base constellation, we achieve net data rates of up to 76.8 Gbit/s at 32 GBd. The system's performance is evaluated across various symbol rates and shaping entropies, with bit-error rates (BER) analyzed in relation to signal-to-noise ratio (SNR) at the receiver.