Abstract
We realized a single-carrier, polarization-multiplexed 32 Gbaud 128 QAM coherent transmission. Digital frequency-domain equalization enabled us to achieve waveform distortion compensation of a wideband data signal with high frequency resolution. Thus, we successfully increased the QAM multiplicity to 128 at 32 Gbaud, and transmitted 448 Gbit/s data over 150 km with a potential spectral efficiency of 10.7 bit/s/Hz. This is the highest multiplicity and spectral efficiency yet achieved in a coherent QAM transmission at a baud rate of as high as 32 Gbaud.
Original language | English |
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Pages (from-to) | 28423-28429 |
Number of pages | 7 |
Journal | Optics Express |
Volume | 23 |
Issue number | 22 |
DOIs | |
Publication status | Published - 2015 Nov 2 |