Multilevel amplitude regeneration of return-to-zero PAM-4 signals is experimentally demonstrated using a single NOLM unit. The noise suppression capability at each amplitude level is characterized, and Q2-factor improvement of 0.92dB is achieved by optimizing input signal power and distortion strength
Bibliographical note© Copyright - ECOC 2017
Funding: EPSRC project UNLOC (EP/J017582/1), the Marie Sklodowska-Curie Action (701770-INNOVATION), the National Natural Science Foundation of China (61505021, 61671108), and the Program for Changjiang Scholars and Innovative Research Team in Universities of China (IRT1218), 111 Project (B14039).
Wen, F., Tsekrekos, C. P., Zhou, X., Geng, Y., Wu, B., Qiu, K., Turitsyn, S. K., & Sygletos, S. (2018). Multilevel Amplitude Regeneration of PAM-4 Signals using a Nonlinear Optical Loop Mirror. In European Conference on Optical Communication (ECOC) IEEE. https://doi.org/10.1109/ECOC.2017.8345940