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We introduce FFSS, an optical fiber simulator entirely developed in MATLAB® which takes advantage of parallel calculation on graphic processing units (GPU). This software solves the nonlinear Schrödinger equation (NLSE) - the single-mode fiber wave equation - relying on the well-known split-step Fourier method (SSFM). FFSS operates on either the PMD-Manakov equation (PMD-ME) that averages out random...
Setting guard band is an important way to mitigate the physical layer impairments like channel interference and cross-talk interference in Elastic Optical Networks (EONs). The goal of this paper is to study the optimal guard band size against non-linear noise caused by cross channel interferences. Through a classical routing and spectrum assignment algorithm, we investigate the total blocking probability...
We investigate our proposed two stage extended Kalman filtering (EKF) technique for the joint tracking of frequency offset (FO), laser phase noise, fiber nonlinearity as well as amplitude noise. The EKF employed in the first stage coarsely compensates the FO using a set of training data symbols. In the second stage, the employed EKF accomplishes the task of compensating the residual FO, phase noise...
A universal simulation model for rare earth doped cw fibre lasers is presented. The model is based on generic rate and gain equations and therefore is very compact. It can be used for any fibre doped with one or several rare earth ions. The model allows for spectral simulations as well as radial discretization of the fibre. An algorithm was developed which optimizes the longitudinal fibre segmentation...
Device simulations are a crucial part of the development of novel and more efficient types of solar cells. We give a brief introduction to the theoretical and numerical background of solar cell device simulations, and show that most of the key parameters may be taken from ab initio numerical data, rather than experimental data. We also discuss a simple strategy to implement up- and down-conversion...
One of the main challenges in Network Virtualization deals with the efficient mapping of virtual resources onto optical physical resources. This is commonly referred by Virtual Optical Network Embedding (VONE). The application of VONE for Elastic Optical Networks (EONs) has attracted the attention of industry due to the flexibility and higher transmission rates able to cope with the tremendous IP...
For boundary problems' solution in optics and quantum mechanics the same computational methods are in use. However, with the increase of local light intensity in nano-optics and energy of particles in quantum mechanics non-linear phenomena are appeared and, as a consequence, a new approach for boundary problems solution is topical. Non-traditional method of single expression (MSE) is an alternative...
This work presents an overview of a combined experimental and theoretical analysis on the manipulation of temporal localized structures (LSs) found in passively Vertical-Cavity Surface-Emitting Lasers coupled to resonant saturable absorber mirrors. We show that the pumping current is a convenient parameter for manipulating the temporal Localized Structures, also called localized pulses. While short...
Two decades ago, M.Dyakonov and M.Shur predicted the emission of THz electromagnetic (EM) radiation by simple transistors [1]. Their mechanism showed great potential as it uses a cheap to build and compact device. When submitted to a constant source-to-drain current and a constant gate-to-source voltage, hydrodynamical instabilities in small enough transistors should induce a spontaneous oscillation...
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