A NEW-TYPE ULTRAVIOLET SHG CRYSTAL——β-BaB_2O_4

On the basis of our work "An anionic group theory of electro-optical and nonlinear optical effects of the crystals", we first proposed the possibility of searching for new-type SHG crystals among the inorganic materials possessing planar ring groups. Since then, a new-type ultraviolet StIG crystal—β-BaB_2O_4 has been developed, a crystal with excellent optical homogeneity, anti-deliquescence and easy-working mechanical properties. Various measurements have been made thereupon of its powder sample tests, phase diagram, structural determination and other performance tests. The following parameters of β-B_aB_2O_4 have thus been determined: space group at room temperature R3, melting point 1095℃, phase transition temperature 925±5℃, transparent band range 190—2500mμ, phase matching angle at 539—270mμ 47°, and radiation damage threshold 2GW/em~2. Its effective SHG coefficient is 3—6 times larger than that of ADP (at different wavelengths). It is expected that this new crystal will find wide and e     

β-BaBO_2O_4光参量振荡器

本文首次报道用1.064μmNd:YAG激光二次谐波泵浦的单共振和双共振β-BaB_2O_4光参量振荡器(OPO)的实验结果.振荡器的调谐范围分别为0.83～0.89μm 、1.63～1.73μm、和0.97～1.18μm.单共振和双共振的最大输出能量分别为200μJ/pulse和1mJ/pulse.     

BBO晶体的五倍频

本文报道了用BBO晶体对Nd:YAG激光器输出的1064nm光的五倍频,获得了213nm的紫外输出,266nm转换至213nm的转换效率达48%.并用数值积分的方法从理论上分析了1064nm与266nm的混频过程,得出的结论与实验结果相符.     

新型紫外倍频晶体β-BaB_2O_4的光学性能和生长

本文报道了新型紫外倍频晶体——β-BaB_2O_4的生长、性能和应用前景.这一晶体的空间群为R_3,且以(B_3O_6)~(-3)平面环状基因为基本结构单位,其熔点为1095℃,采用高温熔盐法生长.晶体的有效倍频系数约为ADP的3—6倍(不同波长),透光波段为190mμ→3000 mμ,在539mμ→270 mμ范围内其信频转换的相匹配角只有47°,因此在紫外区具有比Urea晶体更大的相匹配范围.光损伤阀值为2GW/cm~2.同时,这一晶体还具有光学均匀性好,不易潮解,能承受各种机械加工等等优点,预计这一新型晶体在紫外和近红外区将会有广泛的应用前景。