Experimental Study of Subcarrier Multiplexing Benefit in 74 nm Bandwidth Transmission up to 20,450 km

摘要

We experimentally demonstrate 0.8dB subcarrier-multiplexing benefit for QPSK signals transmitted in 74nm bandwidth over 20,450km, and only 0.2dB benefit is achieved for 16QAM signals. We observe subcarrier index performance dependence due to the transmitter RF noise spectrum.