Title :
Influence of Pulse Shape in 112-Gb/s WDM PDM-QPSK Transmission
Author :
Torrengo, Enrico ; Makovejs, Sergejs ; Millar, David S. ; Fatadin, Irshaad ; Killey, Robert I. ; Savory, Seb J. ; Bayvel, Polina
Author_Institution :
Dipt. di Elettron., Politec. di Torino, Torino, Italy
Abstract :
In this work, we investigated the influence of pulse shape on the transmission performance of polarization-division-multiplexed quadrature-phase-shift keying modulation format at 112 Gb/s in a ten-channel wavelength-division-multiplexed (WDM) transmission experiment with 50-GHz channel spacing. Nonreturn-to-zero (NRZ) and return-to-zero with 50% duty cycle (RZ50) were compared. RZ50 was found to have better performance in both single-channel and WDM experiments. Compared with NRZ, the use of RZ50 yielded an increase in reach from 6560 to 7760 km in the single-channel experiment (corresponding to an increase in reach by 18%); in the case of WDM. the reach was extended from 5920 to 7360 km (corresponding to a 24% increase in reach).
Keywords :
quadrature phase shift keying; wavelength division multiplexing; WDM PDM-QPSK transmission; bit rate 112 Gbit/s; frequency 50 GHz; nonreturn-to-zero; polarization-division-multiplexed quadrature-phase-shift keying modulation; pulse shape; wavelength-division-multiplexed; Digital signal processing; Optical fiber communication; Optical fibers; Optical signal processing; Phase shift keying; Wavelength division multiplexing; Advanced modulation formats; coherent optical communications; digital signal processing;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2010.2082520
