Abstract
We investigate, by means of simulations, polarization-multiplexed (PolMux) quadrature duobinary (QDB) as a modulation format for transmitting 111-Gb/s signals with high spectral efficiency (SE) and acceptable system complexity. We show that PolMux-QDB can be used to transmit 111-Gb/s signals with an SE of 4-b/s/Hz, but at the same time has a higher tolerance to nonlinear transmission effects and local oscillator laser linewidth compared to PolMux-16QAM at the same data rate and SE.
Original language | English |
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Pages (from-to) | 751-753 |
Number of pages | 3 |
Journal | IEEE Photonics Technology Letters |
Volume | 22 |
Issue number | 11 |
DOIs | |
Publication status | Published - 2010 |