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 |
|---|---|
| Article number | 5432959 |
| Pages (from-to) | 751-753 |
| Number of pages | 3 |
| Journal | IEEE Photonics Technology Letters |
| Volume | 22 |
| Issue number | 11 |
| DOIs | |
| State | Published - 2010 |
Keywords
- Coherent detection
- Polarization multiplexing (PolMux)
- Quadrature amplitude modulation (QAM)
- Quadrature duobinary (QDB)
- Quadrature phase-shift keying (QPSK)
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