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Electrooptic Coefficient r33 in Proton-Exchanged z-Cut LiTaO3 Waveguides

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It is well known that LiTaO3 offers an attractive alternative to LiNbO3 because of higher optical damage threshold level and smaller birefringence. Recently, optical waveguides fabricated by Zn diffusion in y-cut and z-cut substrates have been reported1). In this method, the zinc diffusion was carried out at 595°C below the Curie temperature for 115 or 240 hours. There are also reports on proton-exchanged waveguides in x-cut2) and z-cut3) substrates successfully fabricated at lower temperature in much fewer hours.

© 1989 Optical Society of America

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