Abstract
We demonstrate high-efficiency ultraviolet (UV) laser generation in a nonlinear optical crystal (BABF); UV light was generated by using a type I BABF crystal as a sum-frequency mixing of the fundamental light and the second harmonic from a picosecond Nd:YAG laser operated at a repetition rate of with a pulse duration of . An output of for the third harmonic was obtained. The conversion efficiency was 26.4%. As far as we know, it was the first time that third-harmonic generation in BABF was achieved. Obviously, the BABF crystal is a promising UV nonlinear optical material because of its relatively large nonlinear coefficient and nonhygroscopicity.
© 2009 Optical Society of America
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