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In this paper, we present the effects of Two Photon Absorption (TPA), Kerr effect, and loss on nonlinear coupling of semiconductor-based microring resonator. Our analysis uses nonlinear directional coupler equations on segmented coupling region of ring-waveguide. The results show that the field transmission between ring and waveguide decays by increasing the incident field as a result of TPA and Kerr...
Here had been analyzed the coupling phenomenon between microrings at high intensities and in the presence of Kerr effect. The studies include the three dimensional analysis between microring-microring and microring-waveguide for lateral arrangement. The results show that the rate exchange of power between microrings has a dependency to the intensity of applied electric field. As the result of Kerr...
An access control system is a mandatory step in the implementation of security policy. The algebra of security introduced by McLean is not enough expressive to model an access control system. Several models appeared thereafter, namely the mandatory models and discretionary models. In this paper we will use the graphs of privileges and the Marked Petri Nets in order to model formally the access control...
Le but de notre étude est d’apprécier les données épidémiologiques concernant les maladies allergiques chez les enfants de la ville de Marrakech, de préciser les différents facteurs de risque et d’étudier les profils de ces différentes pathologies. Cette étude prospective a été réalisée entre décembre 2002 et décembre 2005 chez 160 enfants atopiques consultant pour exploration allergologique. La méthode...
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