Title :
60-GHz Direct Modulation-Direct Detection OFDM-RoF System Using Gain-Switched Laser
Author :
Tong Shao ; Martin, Eamonn ; Anandarajah, Prince 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 radio over fiber system based on direct modulation-direct detection using an externally injected gain-switched distributed feedback (DFB) laser. External injection from a master laser into the gain-switched DFB laser is used to mitigate chirp in the directly modulated DFB laser and 25-km fiber transmission is investigated. Power fading due to multipath transmission induced by fiber chromatic dispersion is theoretically analyzed and experimentally demonstrated.
Keywords :
OFDM modulation; distributed feedback lasers; fibre lasers; optical modulation; radio-over-fibre; direct modulation-direct detection OFDM-RoF system; fiber chromatic dispersion; fiber transmission; frequency 60 GHz; gain-switched DFB laser chirp mitigation; gain-switched distributed feedback laser; orthogonal frequency-division multiplexing radio-over-fiber system; Adaptive optics; OFDM; Optical fiber dispersion; Optical fibers; Optical modulation; Semiconductor lasers; OFDM; Radio over fiber; direct detection; direct modulation; gain-switching;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2014.2364714
