Abstract
Simultaneous regeneration of four high-speed (160 Gbit/s) wavelength-division multiplexed (WDM) and polarization-division multiplexed (PDM) signals in a single highly nonlinear fiber (HNLF) is demonstrated. The regeneration operation is based on four-wave mixing in HNLF, where the degraded data signals are applied as the pump. As a result, the noise on both '0' and '1' levels can be suppressed simultaneously in our scheme. The stimulated Brillouin scattering (SBS) from the continuous wave (CW) is suppressed by cross-phase modulation (XPM) from the data pump, relieving the requirement of external phase modulation of the CW light. Mitigation of the inter-channel nonlinearities is achieved mainly through an inter-channel 0.5 bit slot time delay. Bidirectional propagation is also applied to relieve the inter-channel four-wave mixing. The multi-channel regeneration performance is validated by bit-error rate (BER) measurements. The receiver powers at the BER of 10-9 are improved by 1.9 dB, 1.8 dB, 1.6 dB and 1.5 dB for the four data channels, respectively. © 2014 Optical Society of America.
| Original language | English |
|---|---|
| Journal | Optics Express |
| Volume | 22 |
| Issue number | 10 |
| Pages (from-to) | 11456-11464 |
| ISSN | 1094-4087 |
| DOIs | |
| Publication status | Published - 2014 |
Keywords
- Four wave mixing
- Phase modulation
- Continuous waves
- Cross-phase modulations
- Data channels
- Data signals
- Highly nonlinear fiber(HNLF)
- Regeneration performance
- Stimulated Brillouin Scattering (SBS)
- Wave length division multiplexed (WDM)
- Multiplexing