Title :
60 GHz Radio Over Fiber System Based on Gain-Switched Laser
Author :
Tong Shao ; BeltraÌn, Marta ; Rui Zhou ; Anandarajah, Prince M. ; Llorente, Roberto ; Barry, Liam P.
Author_Institution :
Radio & Opt. Commun. Lab., Dublin City Univ., Dublin, Ireland
Abstract :
A radio over fiber (RoF) transmission system based on a gain-switched laser as an optical comb source is proposed and demonstrated. 12.5 Gb/s 16 quadrature amplitude modulation (16 QAM) signal generation and transmission over 25 km standard single-mode fiber is experimentally demonstrated using a 60 GHz carrier. The phase noise of the 60 GHz signal resulting from the beating of two partially phase uncorrelated optical tones is theoretically studied and experimentally investigated. Phase noise comparison with different linewidth comb sources is implemented in the proposed RoF system, and the performance of the various systems with different levels of phase noise is presented.
Keywords :
laser noise; optical modulation; phase noise; quadrature amplitude modulation; radio-over-fibre; solid lasers; 16 QAM; bit rate 12.5 Gbit/s; distance 25 km; frequency 60 GHz; gain-switched laser; optical comb source; phase noise; quadrature amplitude modulation; radio over fiber transmission system; standard single-mode fiber; Laser noise; Optical amplifiers; Optical fibers; Optical filters; Optical mixing; Optical modulation; Gain-switching; optical comb source; optical delay; phase noise; radio over fiber (RoF);
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2014.2308152
