Title :
Experimental Demonstration of Improved Equalization Algorithm for IM/DD Fast OFDM
Author :
Xing Ouyang ; Hongyu Zhang ; Yong Chen ; Alam, Shaiful ; Petrovich, Marco N. ; Poletti, Francesco ; Richardson, David J. ; Gunning, Fatima C. G. ; Jian Zhao
Author_Institution :
Photonic Syst. Group, Univ. Coll. Cork, Cork, Ireland
Abstract :
We experimentally investigate the fast orthogonal frequency division multiplexing (OFDM) scheme with improved performance in compensating asymmetric channel impulse response using single-tap equalizers. We demonstrate for the first time 18 Gb/s intensity modulation and direct detection optical fast OFDM over both 80 km standard single-mode fiber at 1.55 μm and 1.15 km hollow-core photonic bandgap fiber at 2 μm. The results show that the proposed algorithm has better performance and lower complexity than the previous schemes under asymmetric channel impulse responses. In addition, the results validate that the emerging 2 μm fiber-optic system can achieve the performance close to that of the 1.55 μm system.
Keywords :
OFDM modulation; equalisers; intensity modulation; optical communication equipment; optical fibre communication; optical fibres; photonic band gap; telecommunication channels; IM/DD fast OFDM; asymmetric channel impulse response compensation; bit rate 18 Gbit/s; direct detection; distance 1.15 km; distance 80 km; hollow-core photonic bandgap fiber; improved equalization algorithm; intensity modulation; orthogonal frequency division multiplexing; single-tap equalizers; standard single-mode fiber; wavelength 1.55 mum; wavelength 2 mum; Bit error rate; OFDM; Optical fiber communication; Optical fibers; Optical noise; Signal to noise ratio; Fast orthogonal frequency division multiplexing (OFDM); discrete cosine transform (DCT); single-tap equalizer;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2015.2443076
