Efficient 266 nm Ultraviolet Beam Generation in K2Al2B2O7 Crystal
LU Jun-Hua 1, WANG Gui-Ling 1, XU Zu-Yan 1, CHEN Chuang-Tian 2, WANG Ji-Yang 3, ZHANG Cheng-Qian 3, LIU Yao-Gang 3
1Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080
2Beijing Center for Crystal Research & Development, Chinese Academy of Sciences, Beijing 100080
3State Key Laboratory of Crystal Materials, Shandong University, Ji’nan 250100
Efficient 266 nm Ultraviolet Beam Generation in K2Al2B2O7 Crystal
1Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080
2Beijing Center for Crystal Research & Development, Chinese Academy of Sciences, Beijing 100080
3State Key Laboratory of Crystal Materials, Shandong University, Ji’nan 250100
Abstract： The ultraviolet beam at 266 nm was obtained by fourth harmonic generation of 1064 nm Nd:YAG laser radiation through a nonlinear crystal K2Al2B2O7 (KABO). The fundamental frequency of a flash-lamp pumped Nd:YAG laser was doubled in a β-Ba2B2O4 crystal to generate a second harmonic output at the wavelength of 532 nm, and then doubled again in KABO crystal to generate the fourth harmonic output at 266 nm. The optical conversion efficiency from 532 to 266 nm was investigated for the first time, and 13% was achieved.
2002, Vol. 19 
