Title :
Demonstration of Dispersion-Enhanced Phase Noise in RGI CO-OFDM Systems
Author :
Zhuge, Qunbi ; Mousa-Pasandi, Mohammad E. ; Morsy-Osman, Mohamed ; Xu, Xian ; Chagnon, Mathieu ; El-Sahn, Ziad A. ; Plant, David V.
Author_Institution :
Dept. of Electr. & Comput. Eng., McGill Univ., Montreal, QC, Canada
Abstract :
We report the first experimental demonstration of dispersion-enhanced phase noise (DEPN) in reduced-guard-interval (RGI) coherent optical orthogonal frequency-division multiplexing (CO-OFDM) systems. It is first shown that channel estimation enhances DEPN. Then we experimentally demonstrate that for 28 Gbaud dual-polarization QPSK (112 Gb/s) RGI CO-OFDM systems with different inverse fast Fourier transform sizes, the transmission distance at a bit error rate = 3.8×10-3 is limited to 1830-2550 km by DEPN when a distributed feedback laser with a 2.6-MHz linewidth is employed as the local oscillator. We also, however, show that using DEPN compensation can increase the distance to 3320-4400 km.
Keywords :
OFDM modulation; channel estimation; compensation; distributed feedback lasers; fast Fourier transforms; optical fibre polarisation; optical modulation; oscillators; phase noise; quadrature phase shift keying; telecommunication channels; DEPN compensation; RGI CO-OFDM systems; channel estimation; dispersion-enhanced phase noise; distributed feedback laser; dual-polarization QPSK RGI CO-OFDM systems; experimental demonstration; inverse fast Fourier transform; local oscillator; reduced-guard-interval coherent optical orthogonal frequency-division multiplexing systems; transmission distance; Bit error rate; Channel estimation; Distributed feedback devices; Laser noise; Optical noise; Phase noise; Signal to noise ratio; Dispersion-enhanced phase noise (DEPN); orthogonal frequency-division multiplexing (OFDM); phase estimation;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2012.2206379
