Generation of UV radiation at 335.5 nm based on frequency-quadrupling of a diode-pumped Nd:YVO_4 laser

作     者：范秀伟 黄海涛 蒋继建 何京良 

作者机构：College of Physics and Electronics Shandong Normal University Department of Physics Heze University 

出 版 物：《Chinese Optics Letters》 (中国光学快报（英文版）)

年 卷 期：2008年第6卷第3期

页      面：192-194页

核心收录：

学科分类：0808[工学-电气工程] 080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：the National Natural Science Foundation of China under Grant No.60478009 the Program for Taishan Scholars 

主　　题：Beam quality Conversion efficiency Harmonic generation Pumping (laser) Semiconductor lasers Ultraviolet radiation 

摘      要：The generation of ultraviolet （UV） light at 335.5 nm based on frequency quadrupling of a diode-end- pumped Q-switched Nd：YVO4 laser at 1342 nm was demonstrated. KTP crystal was used for generation of wavelength of 671 nm by intracavity doubling and LBO （BBO） crystal was exploited for the subsequent external fourth harmonic generation （FHG）. With 6.3-W absorbed pump power and 10-kHz frequency repetition rate, the UV output power of 35 and 63 mW were obtained by using LBO and BBO as frequency quadrupling nonlinear crystals, respectively. The experimental results show that the conversion efficiency （red-UV） of 6.4% for BBO crystal is higher than that of 3.5% for LBO crystal, but the UV beam quality obtained by LBO crystal is better than by BBO crystal.