Comparison of performance of a mixed line rate optical WDM network using different modulations at 40Gbps

Investigation of Influence of Mixed Configurations on Performance of WDM-PON

“…However, the SE of the system is only 0.27 bit/s/Hz due to relatively big 100 GHz channel spacing. According to the results obtained in [8] for the long-haul MLR WDM system, it is possible to achieve higher SE (0.68 bit/s/Hz) by applying the unequal channel spacing for MLR system. Nonetheless, the SE demonstrated by equal-channel NRZ transmission system is even lower (equal to 0.1 bit/s/Hz) than demonstrated by our proposed MLR system, which means that introducing of high-data rate channels can significantly improve the spectral efficiency of the system.…”

“…DB was also more efficient than other formats at 40 Gbit/s transmission rate. Furthermore, according to the results demonstrated in [8] DB was the most successful format for the utilization in MLR systems in comparison with NRZ and DPSK. In addition authors in [10] report, that DB demonstrated higher SE in comparison with NRZ, RZ and CSRZ in the long-haul high-data rate system with unequal channel spacing and MMFs.…”

“…Authors in [7] reveal that the applying unequally channel spacing in proper configuration provides increasing the SE of WDM backbone network with MLRs and MMFs. Authors in [8] also demonstrate the successful implementation of MLR transmission system with unequal channel spacing, comparing the performance of NRZ. DB and NRZ differential phase shift keying (NRZ-DPSK) modulation formats in 40 Gbit/s transmission systems.…”