Title :
Chromatic Dispersion-Induced Optical Phase Decorrelation in a 60 GHz OFDM-RoF System
Author :
Tong Shao ; Martin, Eric ; Anandarajah, Prince M. ; Browning, Colm ; Vujicic, Vidak ; Llorente, Roberto ; Barry, Liam P.
Author_Institution :
Radio & Opt. Commun. Lab., Dublin City Univ., Dublin, Ireland
Abstract :
We propose and demonstrate a 25-Gb/s 16-quadrature amplitude modulation orthogonal frequency division multiplexing 60-GHz radio over fiber transmission system based on a gain-switched optical comb source. The impact of the phase noise caused by the optical phase decorrelation due to the chromatic dispersion is theoretically studied and experimentally investigated by employing a high linewidth comb source and transmitting over a 50-km standard single-mode fiber reel. A time delay precompensation is deployed based on the study of phase noise in order to reduce the phase noise impact, and thereby improve system performance.
Keywords :
OFDM modulation; decorrelation; light sources; light transmission; microwave photonics; optical communication equipment; optical correlation; optical delay lines; optical fibre dispersion; optical noise; optical switches; radio-over-fibre; spectral line breadth; OFDM-RoF system; bit rate 25 Gbit/s; chromatic dispersion-induced optical phase decorrelation; distance 50 km; frequency 60 GHz; gain-switched optical comb source; high-linewidth comb source; phase noise impact reduction; radio over fiber transmission system; single-mode fiber reel; sixteen-quadrature amplitude modulation orthogonal frequency division multiplexing; time delay precompensation; OFDM; Optical attenuators; Optical fibers; Optical modulation; Optical noise; Phase noise; Radio over fiber; chromatic dispersion; gain-switching; optical phase decorrelation; phase noise;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2014.2344314
