Orthogonal Frequency Division Multiplexing for Adaptive
Dispersion Compensation in Long Haul WDM Systems
Arthur James Lowery, Liang Du and Jean Armstrong
Department ofElectrical & Computer Systems Engineering, Monash University, Clayton, 3800, Australia
Tel: +61 3 9905 3223, Fax: +61 3 9905 3454, firstname.lastname@example.org
Abstract: Simulations show orthogonal frequency division multiplexing (OFDM) with optical
single sideband modulation can adaptively compensate for dispersion in 4000-km 32x10Gbps
WDM SMF links with 4000 spectral efficiency. OFDM requires no reverse feedback path so can
compensate rapid plant variations.
©2006 Optical Society ofAmerica
OCIS codes: (060.2330) Fiber optics communications (060.4080) Modulation
Electronic Dispersion Compensation (EDC) can adaptively compensate for dispersion in fiber links and networks, so
reduces outside plant complexity and engineering design while increasing operational flexibility . For example, in
Electronic Predistortion (PD) [1-4] a digital processor calculates the optical signal waveform that will become a
perfect waveform at the receiver once it has propagated along 5120 km of standard single-mode fiber (S-SMF) .
Unfortunately, predistortion requires a reverse feedback path. This means that rapid variations caused by thermal
drift, vibration, optical network switching, and polarization rotation cannot be compensated for.
Orthogonal-Frequency Division Multiplexing (OFDM)  has been rapidly and widely adopted in RF-wireless