排序方式: 共有55条查询结果,搜索用时 15 毫秒
31.
32.
一种新型有机染料HEASPS在不同波长时的双光子吸收和频率上转换性质研究 总被引:1,自引:1,他引:0
报道了一种新型双光子吸收染料 ,即反式 - 4- [4′- (N-羟乙基 - N-乙基胺基 )苯乙烯基 ]- N-甲基吡啶对甲苯磺酸盐的非线性光学性质 ;测试了染料在 72 0~ 110 0 nm波段的非线性透过率曲线。结果发现 :双光子吸收最强波长相对线性吸收峰波长的两倍处有明显蓝移 ;计算出的相应波长的双光子吸收截面在 930 nm处染料有最大双光子吸收截面(2 .0 6× 10 - 4 7cm4·s/ photon) ;测量了染料在 90 0~ 110 0 nm波段的上转换效率 ,在 10 2 0 nm处有最高效率 (5 .1% ) ,最高激射效率的波长相对最强双光子吸收的波长有明显红移 相似文献
33.
34.
高质量GdxY1—xCOB晶体生长及其1.064μm二、三倍频非临界相位匹配性质 总被引:1,自引:0,他引:1
本文介绍了高质量非线性光学晶体GdxY1-xCa4O(BO3)3(GdYCOB)的生长,在这类晶体的Y向实现了1.064μm激光的Ⅱ类二倍频(SHG)和Ⅰ类三倍频(THG)的非临界相位匹配(NCPM);在x=0.20的晶体中实现倍频NCPM,基频输入功率为110mW时,输出的532nm绿光为40.3mW,转换效率达36.7%,在x=0.22的晶体中实现三倍频的NCPM,输入功率为133mW时,输出的355nm紫外光为19.7mW,在输入功率为80mW时,转换效率为21%。 相似文献
35.
测量了BIBO晶体的主轴折射率.对BIBO晶体在整个空间内的倍频性质进行了系统讨论.当基频 光为Nd:YAG激光时(λ=1064nm),发现最大的有效非线性光学系数位于(168.9°,90°) 的Ⅰ类相位匹配方向上.测量了BIBO晶体的容限角、容限温度、光损伤阈值,以及1064nm的 腔外、腔内倍频性质.实验中,最大腔外倍频转换效率达到68%,腔内倍频输出达到1.06W.
关键词:
低对称性
BIBO晶体
倍频 相似文献
36.
37.
38.
39.
Supermolecular crystal composed of p-nitrophenol, hexamethylenetetramine, phosphoric acid and water was obtained by supermolecular assembly. The crystal has a centrosymmetric structure with space group P21/c. The relative intensity and integral value of green frequency doubling of light from the crystal powder compared with that from KDP powder measured by pico-second Nd:YAG laser are 757.3 (KDP: 183.4) and 1771.7 (KDP: 423.98), respectively. In supermolecular crystal, due to the arrangement of centrosymmetric p-nitrophenol molecules in the inorganic-organic host framework formed by hexamethylenetetramine, phosphoric acid and water, the distances between the p-nitrophenol molecules with centrosymmetry are changed (N1A-O1A: 0.8158 nm, N1B'-O1B: 1.4450 nm, N1A-N1A': 0.5837 nm, N1B'-N1B: 0.6898 nm), and the interaction between the dipoles becomes weak, which is easy for the ground state to turn into the excited state charge separated form, and generate the stable asymmetrical distribution of π-electron clo 相似文献
40.