Open AccessSingle-channel 384 Tbit/s, 64 QAM coherent Nyquist pulse transmission over 150 km with a spectral efficiency of 106 bit/s/Hz
Author(s) -
Junpei Nitta,
Masato Yoshida,
Kosuke Kimura,
Keisuke Kasai,
Toshihiko Hirooka
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.015199
Subject(s) - optics , bit error rate , transmission (telecommunications) , pulse shaping , nyquist–shannon sampling theorem , polarization mode dispersion , terabit , quadrature amplitude modulation , physics , spectral efficiency , channel (broadcasting) , telecommunications , computer science , laser , wavelength division multiplexing , dispersion (optics) , wavelength , computer vision
We report a polarization-multiplexed 320 Gbaud, 64 QAM coherent Nyquist pulse transmission with a frequency-stabilized mode-locked laser and a modified digital back-propagation method for pulse transmission. Using a combination consisting of a mode-locked laser and a pulse shaper, we obtained a Nyquist pulse with a high OSNR of 51 dB. We achieved error free operation under a back-to-back condition with the OSNR improvement. By developing a new digital back-propagation method for pulse propagation, we achieved a bit error rate below the 7% forward error correction limit of 2x10 -3 for all the tributaries of the OTDM signal data after a 150 km transmission. As a result, single-channel 3.84 Tbit/s data were successfully transmitted over 150 km with a spectral efficiency of 10.6 bit/s/Hz.