PMID- 23736613 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20140110 LR - 20181023 IS - 1094-4087 (Electronic) IS - 1094-4087 (Linking) VI - 21 IP - 11 DP - 2013 Jun 3 TI - Advanced perturbation technique for digital backward propagation in WDM systems. PG - 13607-16 LID - 10.1364/OE.21.013607 [doi] AB - An improved digital backward propagation (DBP) is proposed to compensate inter-nonlinear effects and dispersion jointly in WDM systems based on an advanced perturbation technique (APT). A non-iterative weighted concept is presented to replace the iterative in analytical recursion expression, which can dramatically simplify the complexity and improve accuracy compared to the traditional perturbation technique (TPT). Furthermore, an analytical recursion expression of the output after backward propagation is obtained initially. Numerical simulations are executed for various parameters of the transmission system. The results indicate that the advanced perturbation technique will relax the step size requirements and reduce the oversampling factor when launch power is higher than -2 dBm. We estimate this technique will reduce computational complexity by a factor of around seven with respect to the conventional DBP. FAU - Xiang, Lian AU - Xiang L AD - School of Information Science and Engineering, Lanzhou University, Lanzhou, Gansu 73000, China. FAU - Harper, Paul AU - Harper P FAU - Zhang, Xiaoping AU - Zhang X LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Opt Express JT - Optics express JID - 101137103 EDAT- 2013/06/06 06:00 MHDA- 2013/06/06 06:01 CRDT- 2013/06/06 06:00 PHST- 2013/06/06 06:00 [entrez] PHST- 2013/06/06 06:00 [pubmed] PHST- 2013/06/06 06:01 [medline] AID - 255525 [pii] AID - 10.1364/OE.21.013607 [doi] PST - ppublish SO - Opt Express. 2013 Jun 3;21(11):13607-16. doi: 10.1364/OE.21.013607.