Subsurface Disorder and Electro-Optical Properties of Proton-Exchanged LiNbO 3 Waveguides Produced by Different Techniques

Abstract : It has been established, that proton-exchanged LiNbO 3 waveguides have a marked subsurface layer with structural disorder inducing degradation of electro-optical properties of these waveguides. At the same time, such a subsurface disorder is found to be less pronounced in soft proton-exchanged (SPE) waveguides in comparison with annealed proton-exchanged (APE) ones. The experimental samples of phase modulators fabricated by SPE technique exhibit a better electro-optical efficiency compared to the LiNbO 3 modulators produced by the standard and improved APE techniques.
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Sergey Kostritskii, Yuri Korkishko, V. Fedorov, V. Mitrokhin, O. Sevostyanov, et al.. Subsurface Disorder and Electro-Optical Properties of Proton-Exchanged LiNbO 3 Waveguides Produced by Different Techniques. Journal of the European Optical Society : Rapid publications, European Optical Society, 2014, J. Europ. Opt. Soc. Rap. Public. 9, 14055 (2014), ⟨10.2971/jeos.2014.14055⟩. ⟨hal-01315499⟩

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