一种改进的粉末倍频技术的研究  

Study on An Improved Powder SHG Technique

作　　者：刘桂香[1] 鲁毅[1] 金香[1] 

机构地区：[1]包头师范学院物理科学与技术学院,内蒙古包头014000

出　　处：《内蒙古师范大学学报（自然科学汉文版）》2009年第4期407-410,共4页Journal of Inner Mongolia Normal University(Natural Science Edition)

基　　金：内蒙古自然基金资助项目(20080404MS0114);内蒙古自治区高等学校科学研究基金资助项目(NJzc08135)

摘　　要：提出一种改进的粉末倍频技术．采用光纤探测器探测粉末样品的倍频光和基频光，大大提高了测量结果的精度．光纤探测器能灵活地绕粉末样品旋转．可以方便地测量样品的倍频光强在周围空间的分布．应用这一测试方法对不同尺度范围的标准KIO3晶体粉末透射倍频光和反射倍频光的位相匹配特性进行了测量，结果表明。反射倍频光为非位相匹配．相干长度约58μm，而透射倍频光具有位相匹配特性．测量发现，KIO3晶体粉末颗粒尺寸在187．5~250μm时。其透射光也能实现较好的位相匹配．An improved measurement of powder SHG is proposed in this paper. With the help of fiber- optic probe, the accuracy of measurement of powder SHG efficiency is greatly enhanced. The distribution of SHG intensity for the fiber-optic probe rotating around the powder sample can be easily measured. The method is applied to measure the phase-matching properties of transmission SHG and reflection SHG in the different sizes of KIO3 powder. The results show that its reflection SHG belongs to non-phase-match, the coherence length approximates 58μm, and its transmission SHG is phase-matchable. It is found that the KIO3 powder has the phase-matching properties for the transmission SHG when its sizes are in the range of 187.5μm to 250 μm.

关 键 词：KIO3粉末 倍频技术 位相匹配 光纤探测器 反射 透射 

分 类 号：TN204[电子电信—物理电子学]