title: Pulse-shaping versus digital backpropagation in 224Gbit/s PDM-16QAM transmission.
abstract: We investigate the transmission performance of 224Gbit/s polarization-division-multiplexed 16-state quadrature amplitude modulation (PDM-16QAM) for systems employing standard single mode fiber (SSMF) and erbium doped fiber amplifiers (EDFAs). We consider the effectiveness of return-to-zero (RZ) data pulses with varying duty cycles and digital backpropagation (DBP) in reducing nonlinear distortion in wavelength-division- multiplexed (WDM) links with 3, 5, 7 and 9 channels. Similar improvement in transmission reach of 18-25% was achieved either by pulse-carving at the transmitter or by DBP, yielding maximum transmission distances of up to 1760km for RZ-pulse-shapes and 1280km for NRZ.
authors: Department of Electronic and Electrical Engineering, University College London (UCL), London, UK. cbehrens@ee.ucl.ac.uk
authors: Carsten
authors: C
authors: Behrens
authors: Sergejs
authors: S
authors: Makovejs
authors: Robert I
authors: RI
authors: Killey
authors: Seb J
authors: SJ
authors: Savory
authors: Ming
authors: M
authors: Chen
authors: Polina
authors: P
authors: Bayvel
mesh_terms: D000669:Amplifiers, Electronic; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D007834:Lasers; D008872:Microwaves; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D013685:Telecommunications / Q000295:instrumentation*