Modeling and Simulation of Acousto-Optic Tunable Filter For WDM Applications

Optical filter is one of the most accurate and important elements in pure optical communication network which uses wavelength division multiplexing (WDM). This research includes studying Acousto Optic Tunable Filter (AOTF) in linear anisotropic medium, which depends on the interaction principle between optical waves and acoustic waves. This paper describes simulating and testing the AOTF in MATLAB/Simulink software which is a strong tool for simulating and designing various systems. We have achieved an AOTF model, and created special block which could be added to MATLAB Simulink Library. We have also evaluated the performance of this filter and its ability to select one wavelength between the set combined by WDM. Moreover, we have studied the effect of acoustic wave frequency, its velocity, the properties of the crystal used in manufacturing it, and other influent parameters, along the selected wavelength.

Development the performance Of Optical Network Units (ONU) by Polarization Division Multiplexing technique

This research proposes the development of Optical Network Units by introducing an all optical Filter. This optical filter can treat WDM and PDM technology at the same time enabling us to send a channel on the horizontal and vertical of the same wavelength .The hybrid WDM-PDM technology allows to delivery double channels for users without any changing in infrastructure between optical central office and user . Firstly , this article prove the idea of hybrid WDM-PDM technology by OptiSystem7.0 simulator, secondly we study proposed all optical Filter for three cases of optical access: WDMPDM( Downstream), WDM(Downstream)/( TDM(Upstream) , WDM(Downstream)/ WDM(Downstream) recommended by the international communication federation, ICF.

Study and Design of a Single-Mode Optical Fiber (SMF)

This research aims to study and design a single mode optical fiber using simulation, with a core and glass cladding, and also helps in ensuring the efficiency to use the optical fiber designed within the broading window C-Band,and that these researches and studies tries to use this window. This research also shares to set the light on the Numerical Programmes and Simulation used now in studying and designing these optical fibers. At first we used the programOptifiberto reach the confidence of Sellmeier equation for the fiber core, and this completed by using the finite element method solving the equation of propagation the electric field and finding its 3-D distribution, using the famous simulating COMSOLMultiphysics. This completed by putting the program MATLAB to reach the two equation: the total dispersion and attenuation for the designed optical fiber.