Abstract

Uniform MgO-doped near-stoichiometric LiNbO3 was successfully grown from Li-rich melts by a melt supplying technique. Periodically poled domains were demonstrated in MgO-doped near-stoichiometric LiNbO3 wafers. Efficient quasi-phase-matched difference frequency generation was achieved in a titanium-diffusion waveguide based on periodically poled MgO-doped near-stoichiometric LiNbO3. The conversion efficiency was 7.3dB with a pump power of 150mW and a signal power of 50mW at room temperature. It was found that the 3dB signal conversion bandwidth was as large as 78nm. Photorefractive damage of the device was examined by pump–probe second-harmonic generation at room temperature, and the device exhibited no significant wavelength shift.

© 2009 Optical Society of America

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