Adding channels with PSBT format at 40 Gbit/s in an existing 10 Gbit/s optical network

作者：Khecib F; Latry O^*; Dherbecourt P; Ketata M

来源：Optics Communications, 2011, 284(21): 5125-5129.

DOI：10.1016/j.optcom.2011.06.064

• Differential Phase-Shift Keying (DPSK)
• Phase Shaped Binary Transmission (PSBT)
• Modulation formats
• Metropolitan network
• Wavelength Division Multiplexing (WDM)
• Mixing link 10/40 Gbit/s

Until recently, the wavelength-division-multiplexed (WDM) transmission system has reached record capacities and distances due to innovations such as FEC (Forward Error Correction), distributed Raman amplification, new transmission fiber and advanced optical format. Optical-communication systems exclusively employed conventional On-Off Keying signals in either Non-Return-To-Zero (NRZ) or Return-To-Zero (RZ) format. Recently a number of advanced modulation formats have attracted attention. Some of these formats carry information through On-Off-Keying but also modulate the optical phase in order to enhance the robustness of signal to chromatic dispersion, optical filtering and non-linearities. Through extensive sets of simulation results, we showed that it is possible to replace a channel with higher bit-rate on existing DPSK or OOK at 10Gbit/s transmission link. Duobinary formats are ideal candidates to do it and are known for their low spectral range and high tolerance to residual chromatic dispersion. These particularities make them very attractive for both high bit rates and high distance-transmissions. Today, Phase Shaped Binary Transmission (PSBT) is considered as being the promising format for the deployment of 40Gbit/s technology on existing links at 10Gbit/s WDM long haul transmissions.

• 出版日期2011-10-1