All-optical multilevel regeneration in nonlinear optical loop mirror

Feng Wen, Christos P. Tsekrekos, Xingyu Zhou, Baojian Wu, Mingyue Zhu, Jing Zhang, Kun Qiu, Sergei K. Turitsyn, Stylianos Sygletos

Research output: Chapter in Book/Published conference outputConference publication


An all-optical multilevel amplitude regenerator is optimized based on the transmission response of a nonlinear optical loop mirror (NOLM). Three regenerative regions defined by the power-transfer-function (PTF) slope of less than 1 are obtained, and noise suppression is shown for a PAM4 signal. Using amplitude dithering we were able to experimentally characterize the transfer function slope and confirm the theoretical predictions.
Original languageEnglish
Title of host publication16th International Conference on Optical Communications and Networks (ICOCN)
Publication statusPublished - 1 Dec 2017

Bibliographical note

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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).


  • All-optical regeneration
  • PAM4
  • Nonlinear optical loop mirror


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