Caractérisation et mise en oeuvre des matériaux en vue de la réalisation de modulateurs à base de nouveaux polymères électro-optiques

Abstract : Great interest is devoted to electro-optic (EO) polymers since they allow the fabrication of optical modulators exhibiting high modulation bandwidth and low drive signal. These characteristics are mainly related to a better velocity match between microwave and optical signals as well as a high EO coefficient. The work hereby reported is part of the national funded project "ModPol" aiming to fabricate high modulation bandwidth integrated optics modulators based on long-lasting EO polymers. The work mainly covered two subjects, on one hand the characterization of the microwave properties of polymers, both cladding and core dedicated ones, and on the other hand the chromophore orientation in the active polymers. These studies have been made in IEMN and IETR, respectively. Some modelling of optical and microwave guiding structures have also been completed using HFSS and OptiBPM softwares in order to give an insight into the design of Mach-Zehnder optical modulators. Concerning the first topic, specifically developed software is used in order to determine the microwave characteristics (permittivity and loss tangent) from the S-parameter measurement of microwave coplanar lines fabricated on polymers under investigation. These characteristics have been so obtained for about ten of different polymers up to 60 GHz. Test samples are then fabricated in almost real modulator fabrication conditions and polymer poling is made using either Corona or contact electrode method. A simplified fabrication process has been developed in order a unique solvent to be used for all the different films composing the optical waveguide. An EO coefficient of 28 pm/V has been measured in an optical plan waveguide configuration.
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  • HAL Id : tel-01108308, version 1

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Kenny Robert Philippe Auguste. Caractérisation et mise en oeuvre des matériaux en vue de la réalisation de modulateurs à base de nouveaux polymères électro-optiques. Electronique. UNIVERSITE DE NANTES, 2012. Français. ⟨tel-01108308⟩

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