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Characterization of proton-exchanged waveguides in MgO:LiNbO3

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Abstract

We report the fabrication and characterization of proton-exchanged waveguides in MgO-doped LiNbO3, a high-optical-damage-threshold material. Results indicate waveguide characteristics similar to those of waveguides fabricated in undoped LiNbO3 except for slower diffusion rates and freedom from etching of the y face when pure benzoic acid is used as a proton source. An optical-damage threshold of 70 kW/cm2 was measured at 0.5145 μm in a MgO:LiNbO3 waveguide, corresponding to a factor-of-2 improvement over undoped LiNbO3.

© 1985 Optical Society of America

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