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Abstract:
A photonic-assisted frequency downconverter with self-interference cancellation and fiber dispersion elimination is proposed for in-band full-duplex (IBFD) radio-over-fiber (ROF) systems based on stimulated Brillouin scattering. In this work, a dual-polarization Mach-Zehnder modulator (DPol-MZM) is employed to cancel the self-interference signal in the optical domain, thus the proposed system has a large operation bandwidth without the limitation of the electrical bottleneck. Meanwhile, a widely tunable microwave photonic filter (MPF) based on stimulated Brillouin scattering (SBS) is constructed to perform carrier-suppressed single-sideband modulation of LO. Therefore, the proposed photonic frequency downconverter is naturally free from fiber dispersion. Furthermore, thanks to the characteristics of the SBS-based MPF, such as large out-of-band rejection ratio, high resolution and wideband tunability, the proposed system has a high flexibility and downconversion efficiency, which is of great significance for IBFD ROF systems. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
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OPTICS EXPRESS
ISSN: 1094-4087
Year: 2022
Issue: 17
Volume: 30
Page: 30149-30163
3 . 8
JCR@2022
3 . 8 0 0
JCR@2022
ESI Discipline: PHYSICS;
ESI HC Threshold:41
JCR Journal Grade:2
CAS Journal Grade:2
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