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Index instabilities in proton-exchanged LiNbO3 waveguides
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DOI：10.1063/1.94055.png)
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Abstract
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<jats:p>Measured effective mode indices on a day to day basis reveal an oscillatory behavior which indicates that the index profile of proton-exchanged LiNbO3 waveguides evolves as a function of time. It is suggested that the profile instability might be brought about by a continuous migration of protons within the thickness of the guiding layer. Some index profile modificaiton may also be introduced during fabrication due to structural changes in the crystal as a function of exchange time.</jats:p>
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