Optics Express · 2012 · 62 citations · 13 references
EngineeringCommunicationElectrical EngineeringDigital CommunicationPropagationWireless CommunicationsFiber OpticsFiber-optic CommunicationInterference ManagementNonlinear OpticsOptical Communication SystemsOptical FibersCoherent Optical CommunicationFourier TransformLong-haul Optical TransmissionNonlinearityOptical Nonlinearity CompensationOptical Transmission Systems
Coherent optical OFDM (CO-OFDM) combined with orthogonal band multiplexing provides a scalable and flexible solution for achieving ultra high-speed rate. Among many CO-OFDM implementations, digital Fourier transform spread (DFT-S) CO-OFDM is proposed to mitigate fiber nonlinearity in long-haul transmission. In this paper, we first illustrate the principle of DFT-S OFDM. We then experimentally evaluate the performance of coherent optical DFT-S OFDM in a band-multiplexed transmission system. Compared with conventional clipping methods, DFT-S OFDM can reduce the OFDM peak-to-average power ratio (PAPR) value without suffering from the interference of the neighboring bands. With the benefit of much reduced PAPR, we successfully demonstrate 1.45 Tb/s DFT-S OFDM over 480 km SSMF transmission.
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