All-optical multilevel amplitude regeneration in a single nonlinear optical loop mirror


We experimentally demonstrate all-optical amplitude regeneration of 4-level pulse amplitude modulated signals (PAM4) based on a single nonlinear optical loop mirror (NOLM). Four power-plateau regions are achieved using return-to-zero (RZ) pulses of narrow pulse-width, enabling large nonlinear phase shifts within the highly nonlinear fiber (HNLF). We quantify noise suppression characteristics at each amplitude level and obtain an overall EVM improvement of 0.92dB by optimizing input power and distortion strength. A theoretical analysis has been also carried out matching the experimental results and revealing the design characteristics of the regenerator’s nonlinear transfer function.

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Divisions: Engineering & Applied Sciences
Engineering & Applied Sciences > Aston Institute of Photonics Technology
Engineering & Applied Sciences > Electrical, Electronic & Power Engineering
Engineering & Applied Sciences > Systems analytics research institute (SARI)
Additional Information: Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
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Related URLs: https://www.osa ... =oe-26-10-12698 (Publisher URL)
PURE Output Type: Article
Published Date: 2018-05-14
Accepted Date: 2018-05-13
Authors: Wen, F.
Tsekrekos, C. P.
Geng, Y.
Zhou, X.
Wu, B.
Qiu, K.
Turitsyn, S. K. ( 0000-0003-0101-3834)
Sygletos, S. ( 0000-0003-2063-8733)



Version: Published Version

License: Creative Commons Attribution

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