IEEE Photonics Technology Letters · 2010 · 41 citations · 8 references
EngineeringCommunicationElectrical EngineeringDigital CommunicationOptoelectronicsPhotonicsFiber OpticsFiber-optic CommunicationModulationOptical Communication SystemsOptical FibersOptical ModulationBit Error RateForward Error CorrectionOptical Transmission SystemsPolarization-division MultiplexingQuadrature Amplitude ModulationSingle-mode Fiber PropagationSingle-mode FibersSpectral Efficiency
We demonstrate the generation and transmission of 11 channels with 224-Gb/s polarization-multiplexed return-to-zero 16-level quadrature amplitude modulation over 670 km of standard single-mode fiber (SSMF) with 50-GHz channel spacing and a spectral efficiency of 4.2 b/s/Hz. We report a penalty of around 4.3 dB in the performance at back-to-back in comparison to the theoretical limits, and a margin of 1 dB in <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Q</i> -factor below the forward-error correction limit (assumed to be at a bit-error rate of 3.8 × 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-3</sup> ) after transmission over 670 km of SSMF.
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