Non-uniform step-size based split step fourier method for mitigating fiber transmission impairments in N-channel 224Gbit/s PolMux-16QAM system

Rameez Asif, Chien Yu Lin, Bernhard Schmauss

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We discuss the performance enhancement of digital backward propagation by step-size selection for implementing split-step Fourier method (SSFM) in 224Gbit/s PolMux-16QAM system. The two DBP algorithms based on the step-size selection methods; (a) constant step-size based modified DBP (M-DBP) and (b) non-uniform, i.e. logarithmic, step-size based DBP (L-DBP), are compared for diverse fiber types i.e. Standard Single Mode Fiber (SMF), Non-Zero Dispersion Shifted Fiber (NZDSF), Large Effective Area Pure-Silica-Core-Fiber (LA-PSCF) and Large Effective Area Fiber (LEAF). Non-uniform step-size distribution enhances the transmission distance upto 32% in large effective area pure-silica-core- fiber (LA-PSCF) link as compared to SMF by employing M-DBP, while we have observed an additional 13% increase in transmission distance by employing L-DBP. Furthermore, the impact of reconfigurable add-drop multiplexers (ROADMs) are also investigated in 10×224Gbit/s system with 50GHz channel spacing grid. ROADMs reduce the signal bandwidth and collectively increase the peak to average power ratio, resulting in higher non-linearities that limits the performance of digital backward propagation. The results also depict that heterogeneous fiber links significantly reduce the nonlinear threshold point (NLT) of the transmission system.

Original languageEnglish
Title of host publication2012 18th IEEE International Conference on Networks, ICON 2012
Number of pages5
Publication statusPublished - 2012
Event2012 18th IEEE International Conference on Networks, ICON 2012 - Singapore, Singapore
Duration: 12 Dec 201214 Dec 2012

Publication series

NameIEEE International Conference on Networks, ICON
ISSN (Print)1556-6463


Conference2012 18th IEEE International Conference on Networks, ICON 2012

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