Nonlinear frequency division multiplexing with b-modulation

Shifting the energy barrier

Journal article (2018)

Authors

Tao Gui The Hong Kong Polytechnic University
Gai Zhou The Hong Kong Polytechnic University
Chao Lu The Hong Kong Polytechnic University
Alan Pak Tao Lau The Hong Kong Polytechnic University
S. Wahls Team Sander Wahls - Mechanical, Maritime and Materials Engineering
Research Group
Team Sander Wahls (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2018 Tao Gui, Gai Zhou, Chao Lu, Alan Pak Tao Lau, S. Wahls
DOI: https://doi.org/10.1364/OE.26.027978
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Published Date

2018

Language

English

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Faculty

Mechanical, Maritime and Materials Engineering

Department

Delft Center for Systems and Control

Research Group

Team Sander Wahls

Abstract

The recently proposed b-modulation method for nonlinear Fourier transform-based fiber-optic transmission offers explicit control over the duration of the generated pulses and therewith solves a longstanding practical problem. The currently used b-modulation however suffers from a fundamental energy barrier. There is a limit to the energy of the pulses, in normalized units, that can be generated. In this paper, we discuss how the energy barrier can be shifted by proper design of the carrier waveform and the modulation alphabet. In an experiment, it is found that the improved b-modulator achieves both a higher Q-factor and a further reach than a comparable conventional b-modulator. Furthermore, it performs significantly better than conventional approaches that modulate the reflection coefficient.

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