Driven by high-definition TV, video interactive services, and also with the emergence of the IoT and 5G era, optical transport networks are stepping from 100G to 400G and 1T, according to Yan Xia, director of ZTE’s New Jersey Lab.
The executive highlighted that using high-order QAM modulation is one of the required means for 400G and 1T transmission, but the optical signal-to-noise ratio (OSNR) requirement of traditional 400G solutions is too high to reach the target set by carriers, especially for the 400G single carrier solution.
