Open AccessRing‐modulator‐based RoF system with local SSB modulation and remote carrier reuse
Author(s) -
Tang Zhenzhou,
Zhang Jing,
Pan Shilong,
Roelkens Gunther,
Van Thourhout Dries
Publication year - 2019
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2019.1630
Subject(s) - upstream (networking) , optical carrier transmission rates , radio over fiber , sideband , passive optical network , compatible sideband transmission , modulation (music) , signal (programming language) , ring laser , optical modulator , optical cross connect , electronic engineering , optics , wavelength division multiplexing , radio frequency , physics , computer science , engineering , optical fiber , wavelength , telecommunications , laser , phase modulation , acoustics , phase noise , programming language
A full‐duplex radio‐over‐fibre (RoF) system based on an integrated silicon ring modulator is proposed and demonstrated. For the downstream link, a coherent dual‐wavelength laser source is coupled to a silicon ring modulator in the central office (CO). Since only one of the optical carriers in the dual‐wavelength laser source is aligned to the resonance of the ring modulator, a single sideband (SSB) modulated optical downstream signal is obtained, which is able to combat the power fading introduced by the fibre dispersion. Besides, for the upstream link, the unmodulated optical carrier in the SSB‐modulated optical downstream signal is reused by using an optical filter in the remote radio head. After being modulated by the upstream data, the optical upstream signal is transmitted back to the CO. A proof‐of‐concept experiment is carried out. Error vector magnitudes of 21‐GHz downstream and 10‐GHz upstream signals are measured, which confirms that the proposed architecture is a promising low‐cost solution for future high‐speed wireless communication systems.