Abstract
We demonstrated the highly efficient UV light generation of 386 nm wavelength in a periodically poled MgO:LiNbO3 waveguide. Utilizing multiple short pulses for electric poling to off-cut MgO:LiNbO3, we succeeded in fabricating a uniform periodically poled structure with a period of 2.2 µm and a thickness of 1.5 µm over a 10 mm interaction length. By using this structure with a waveguide, the harmonic ultraviolet light generation with a high conversion efficiency of 1000 %/W was achieved in a single-pass configuration.
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