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Information × Registration Number 0216U002886, 0116U004408 , R & D reports Title Modeling and characterization of Lithium Niobate (LiNbO3) based optical devices using surface geometric techniques for their applications in Integrated Optical Circuits (IOCs) popup.stage_title Head Buryy Oleh, Registration Date 22-12-2016 Organization Lviv Polytechnic National University popup.description2 The optimal geometry of the electrooptic interaction in lithium niobate crystal is determined for the optical switch based on Mach-Zender interferometer in integral optics design. Particularly, the directions of light wave propagation and voltage appling which maximize the observed effect are defined. The changes of structural and optical characteristics of LiNbO3 crysta due to ihgh-temperature annealing in reducing and oxidizing atmospheres as well as at the presence of metal ions (Cu, Fe, Ni) are determined by group of methods including optical and IR- spectrometry, secondary ions mas-sprectrometry, X-rays difractometry. The obtained results allow to predict and optimize the paramaters of technological processes of wave-guide structures formation. The mathematical modeling of redox annealing is carried out. The mathematical model taking into account the oxygen vacanices incorporation into the crystal during reduction annealing and the changes of the optical absorption caused by boundary polarons and bipolarons formation is in good aggrement with experimental results. Product Description popup.authors Сугак Дмитро Юрійович Убізський Сергій Борисович popup.nrat_date 2020-04-02 Close