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Domain inversion in MgO-diffused LiNbO3

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Abstract

We obtain the periodic modulation of domain polarization by patterning MgO on the positive C-face of LiNbO3, followed by Li outdiffusion to induce domain inversion. We obtain domain inversion lines (1.5 μm) by heat treating LiNbO3 at 1000 °C for 2 h with a 1-μm inversion depth. This process may be suitable for fabrication of first-order gratings that are needed for high second-harmonic conversion efficiency by using a quasi-phase-matched technique.

© 1993 Optical Society of America

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