High-efficiency 355 nm generation in barium aluminum borate diflouride (BaAlBO3F2).
We demonstrate high-efficiency ultraviolet (UV) laser generation in a nonlinear optical crystal BaAlBO3F2 (BABF); 355 nm 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 10 Hz with a pulse duration of 20 ps. An output of 0.635 mJ 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.
Zhou
Yong
Y
Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China. yung_zhou@yeah.net
Wang
Guiling
G
Yue
Yinchao
Y
Li
Chengming
C
Lu
Yuanfu
Y
Cui
Dafu
D
Hu
Zhanggui
Z
Xu
Zuyan
Z