Theoretical and numerical characterization of a 40 Gbps long-haul multi-channel transmission system with dispersion compensation

Abstract

Cite this article as: Kaikai Xu, Yang Ou, Theoretical and numerical characterization of a 40 Gbps long-haul multi-channel transmission system with dispersion compensation, Digital Communications and Networks, http://dx. ABSTRACTWhen updating the 10 Gbps optical transmission system to 40 Gbps, the main limits are chromatic dispersion, nonlinear effect, especially the interactions of dispersion and intra-channel nonlinearity. To optimize the performance of standard WDM in a 40Gbps four-channel transmission system, numerical simulations are carried out to comparing three different dispersion compensation techniques (without compensation; periodic dispersion compensation at the front end; and dispensation compensation all at the end of the system by means of highly dispersed pulses) for chromatic dispersion on a terrestrial 40 Gbps system. Both the loss and dispersion of the transmission fiber are periodically compensated, since two dispersive elements are placed at the input and the output ends of a compensation period. Due to the interplay between dispersion, nonlinearity and signal power, and the effect of dispersion on the pulse evolution, the pulse compress can be optimized and the system performance can be improved to compare with the system with either pre-or post-dispersion compensation. On comparing pre-and post-compensation methods, it is found that the lateral is superior to the former. Further performance optimization includes how to properly match the EDFA power and length of the fiber.

Comparative analysis of long-haul system based on SSB modulation utilising dual parallel Mach–Zehnder modulators

“…In the RoF system, the fibre dispersion induced power fading can be resolved by using the OSSB (Niknamfar and Shadaram 2013;Cui et al 20012). Prior to generating simulation results using VPI and Optisystem simulation software, we benchmarked our simulations with experimental results published (Devgan et al 2012;Xu et al 2015), based on the linearization and harmonic distortion of the photonic link and other published work for dispersion compensation (Paloi et al 2017;Xu et al 2015). When we compare our results with other published based modulation schemes, the maximum achieved transmission length goes up to 2400(km), as illustrated in Fig.…”

“…(21), we have managed to completely remove the third order (-J3) sideband and suppress the other third order sideband (J3), while generating the OSSB (-J1) needed for the long-haul transmission, as illustrated in Fig. 8a, (Xu et al 2015). The SSB signal generated after the parent modulator is connected to the third modulator, where the output optical signal will modulate coded messages, as illustrated in Fig.8b.…”

A Novel Architecture to Reduce Dispersion in Fiber by Using Pre, Post and Symmetrical DCF Methods

“…A waveguide and in sound waves.). In single mode fiber (SMF) dispersion has main two component [5] I. Wavelength dispersion: This occurs because of different refractive index (R.I.) of core and cladding. Short wavelength light travels within core, medium wavelength light spread slightly into the cladding and long wavelength light spread much into the cladding.…”

“…The following are the parameter for a dispersion which considers for transmission. The chromatic dispersion coefficient is a primary parameter for data loss [5]. To determine CD following equation are consider.…”

“…It determines the speed at which pulse energy propagate in fiber. For propagation of electromagnetic wave (EMW) in a homogeneous and monochromatic medium [5].…”