Structural and optical characterization for vapor-phase proton exchanged lithium niobate waveguides

D. H. Tsou, M. H. Chou, P. Santhanaraghavan, Y. H. Chen, Y. C. Huang

研究成果: 雜誌貢獻期刊論文同行評審

12 引文 斯高帕斯(Scopus)

摘要

We have studied the crystalline phase transition for vapor-phase proton exchanged (VPE) lithium niobate waveguide by using pure benzoic acid. The VPE layers in the z-cut lithium niobate crystal have been characterized by X-ray rocking curves, OH- bond infrared absorption, and prism coupling measurements. The crystalline quality assessment by the X-ray rocking curve measurement shows desirable κ2 phase formation for nonlinear optical waveguide applications. It has been observed that the crystalline phase makes a transition from the κ2 to the β phase with the increase in the vapor-phase exchange time. The prism coupling measurement also showed a step-like index profile for our VPE samples. From the step index profile, we deduced an effective diffusion coefficient of 0.14 μm2h-1, which is twice than that of the previously reported value. Shift in the OH- bond absorption wavelength with crystalline phase change and the increase in absorption with the exchange time were also observed from our spectrophotometer measurement.

原文???core.languages.en_GB???
頁(從 - 到)474-479
頁數6
期刊Materials Chemistry and Physics
78
發行號2
DOIs
出版狀態已出版 - 17 2月 2003

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