Etude et application des cristaux photoniques

Abstract

A communication system based on WDM wavelength division multiplexing technology is a better approach to achieve the optimal utilization of fiber capacity in order to increase the number of communication channels, research for the design and manufacture of new optical components with higher performance characteristics and reduced size, based on new materials make CPs a promising choice for this purpose. The work presented in this manuscript initially aimed to design a model with optimized configuration of a photonic crystal filter capable of detecting small variations in the lattice constant, the radius of the ""ra"" rods of the resonator and after the variation of the refractive index of the material infiltrated in the rods of the resonator. This optimized filter is integrated and used to operate as a four channel demultiplexer with low interference and good signal quality at the output. For this we started to propose the design of a star-shaped quality filter for the design of an interesting demultiplexer with as a result, a quality factor of 2584.5, a low average crosstalk of -21.92 dB and a size of the structure of 463.11 μm2. After we simulated a second structure of a filter with another form in sub-rings, the simulation showed an average modal transmission rate of 95.30%, a small dimensioning of 144.83μm2 obtained by the optimization of the parameters opto-geometric of this filter, which works with an average quality factor of 3149.12, this value is optimal compared to other systems based on filters. After another demultiplexer based on this filter is proposed. This latest demultiplexer can operate with a high transmission greater than 89%, a quality factor with a maximum value of 2555.5 and an average best crosstalk of about -30.73 dB.