Related Experiment Video
Updated: May 31, 2026

Quasi-light Storage for Optical Data Packets
Published on: February 6, 2014
Pulse-shaping versus digital backpropagation in 224Gbit/s PDM-16QAM transmission
Carsten Behrens1, Sergejs Makovejs, Robert I Killey
1Department of Electronic and Electrical Engineering, University College London (UCL), London, UK. cbehrens@ee.ucl.ac.uk
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.
Related Concept Videos
Time-Domain Interpretation of PD Control
Consider the example of control of motor torque. Initially, a positive...
Frequency-Domain Interpretation of PD Control
The proportional control gain, combined with the system's...
PD Controller: Design
Designing a continuous-data controller requires selecting and linking components like adders and integrators, which are fundamental in Proportional,...
Propagation Speed of Electromagnetic Waves
NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences
¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)
