Title :
DM-DD OFDM-RoF System With Adaptive Modulation Using a Gain-Switched Laser
Author :
Tong Shao ; Martin, Eamonn ; Prince, Anandarajah M. ; Barry, Liam P.
Author_Institution :
Radio & Opt. Commun. Lab., Dublin City Univ., Dublin, Ireland
Abstract :
We propose a 60-GHz orthogonal frequency division multiplexing (OFDM) radio over fiber system based on direct modulation-direct detection using an externally injected gain-switched DFB laser with adaptive modulation format. Power fading due to chromatic dispersion is mitigated by optimizing the bias current. Adaptive modulation for OFDM is used to improve the signal transmission performance. A 15.31-Gb/s 60-GHz OFDM signal generation and transmission over 25-km standard single-mode fiber is experimentally demonstrated.
Keywords :
OFDM modulation; adaptive optics; distributed feedback lasers; light transmission; optical communication equipment; optical fibre dispersion; optical modulation; optical switches; optimisation; radio-over-fibre; OFDM signal generation; OFDM signal transmission; adaptive modulation format; bias current optimization; bit rate 15.31 Gbit/s; chromatic dispersion; direct modulation-direct detection OFDM-radio over fiber system; externally injected gain-switched DFB laser; frequency 60 GHz; orthogonal frequency division multiplexing; signal transmission performance; single-mode fiber; Fiber lasers; OFDM; Optical attenuators; Optical fibers; Optical modulation; Radio over fiber; adaptive modulation; orthogonal frequency division multiplexing; power fading; radio over fiber;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2015.2398126
