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8 × 448-Gb/s WDM transmission of 56-GBd PDM 16-QAM OTDM signals over 250-km ultralarge effective area fiber

: Fischer, J.K.; Molle, L.; Nölle, M.; Schmidt-Langhorst, C.; Hilt, J.; Ludwig, R.; Peckham, D.W.; Schubert, C.


IEEE Photonics Technology Letters 23 (2011), No.4, pp.239-241
ISSN: 1041-1135
Journal Article
Fraunhofer HHI ()

An 8 × 448-Gb/s polarization-division-multiplexing 16-ary quadrature amplitude modulation wavelength-division multiplexing signal with 4-b/s/Hz spectral efficiency is generated using optical time-division multiplexing and real-time field-programmable gate array-based generation of four-level in-phase and quadrature modulator driving signals. Transmission performance over 250-km ultralarge effective area fiber with erbium-doped fiber amplifier-only amplification is investigated.