Analytical analysis of long‐haul DWDM optical transmission systems in the presence of fiber nonlinearities

Abstract

Purpose

Fiber nonlinearities are anticipated to impose transmission limitations due to the enhanced total interaction length in long‐haul dense wavelength division multiplexing (DWDM) optical transmission systems. The purpose of this paper is to analytically study the combined effect of stimulated Raman scattering (SRS) and four‐wave mixing (FWM) in the presence of amplified spontaneous emission (ASE) noise generated by erbium‐doped fiber amplifiers (EDFAs).

Design/methodology/approach

The paper presents analytical analysis of DWDM optical transmission systems in the presence of two significant fiber nonlinearities (SRS and FWM).

Findings

Simple expressions are derived to study the dependence of signal‐to‐noise ratio (SNR) on the amplifier spacing between two consecutive amplifiers.

Originality/value

The authors have analytically studied the combined effect of SRS and FWM in the presence of ASE noise generated by EDFAs. The novelty of the work is that it has considered all the three factors simultaneously and the expressions are derived for calculation of SNR.

Citation

Kaur, G., Singh, M.L. and Patterh, M.S. (2011), "Analytical analysis of long‐haul DWDM optical transmission systems in the presence of fiber nonlinearities", Journal of Engineering, Design and Technology, Vol. 9 No. 3, pp. 336-346. https://doi.org/10.1108/17260531111179942