Title :
Transmission of 4-ASK Optical Fast OFDM With Chromatic Dispersion Compensation
Author :
Zhao, Jian ; Ellis, Andrew
Author_Institution :
Photonic Syst. Group, Tyndall Nat. Inst. & Univ. Coll. Cork, Cork, Ireland
Abstract :
We experimentally demonstrate transmission of 20-Gb/s four-amplitude-shifted-keying optical fast orthogonal frequency-division-multiplexing (F-OFDM) over various fiber lengths up to 840 km, and show that symmetric extension, instead of cyclic extension, based guard interval (GI) is required to enable chromatic dispersion (CD) compensation using one-tap equalizers after channel demultiplexing. We characterize the CD tolerance under different GI lengths and investigate the impact of fiber nonlinearity on the system performance.
Keywords :
OFDM modulation; amplitude shift keying; equalisers; optical dispersion; optical modulation; 4-ASK optical fast OFDM transmission; CD compensation; F-OFDM; GI; bit rate 20 Gbit/s; channel demultiplexing; chromatic dispersion compensation; cyclic extension; four-amplitude-shifted-keying; guard interval; one-tap equalizers; optical fast orthogonal frequency-division-multiplexing; symmetric extension; Discrete cosine transforms; OFDM; Optical fibers; Optical noise; Optical receivers; Signal to noise ratio; Chromatic dispersion (CD); detection; modulation; orthogonal frequency-division multiplexing (OFDM);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2011.2171943
