应用光学, 2009, 30 (3): 457, 网络出版: 2010-05-31
粉末倍频系数的模拟研究
Simulation on powder nonlinear coefficients
Kurtz粉末倍频理论 粉末倍频测试系统 晶体粉末 数值模拟 倍频系数 Kurtz theory measurement system of SHG crystal powder numerical simulation nonlinear coefficient
摘要
根据Kurtz粉末倍频理论,使用光纤光谱仪自行设计搭建一个粉末倍频测试系统,该系统可在基频光波入射方向不变的情况下,通过转动旋转臂在不同方向探测二次谐波,并且具有较高的精确度和灵敏度。使具有位相匹配特性的颗粒尺寸范围扩大为46μm~250μm 。使用波长为1.064μm的基频光,对KIO3晶体粉末的倍频效应进行了测试。测试结果表明,KIO3晶体粉末透射倍频光具有位相匹配特性。这一测试结果与已报道结果相一致。通过数值模拟实验测试曲线,获得了KIO3晶体粉末的倍频系数d2ω的值为9.7×10-12m/V。这一模拟值与已报道的KIO3晶体对该基频光波产生的倍频系数d32的值相吻合。由此可见,该方法切实可行。并且可推广应用到其他晶体材料的非线性特性测试研究。
Abstract
Based on the Kurtz theory, a measurement system of powder second-harmonic (SHG) using fiber spectrometer was designed. The test system can measure SHG in different directions by rotating the arm and not changing-direction of incident fundamental light. It has good accuracy and sensitivity. It enlarges phase-matching particles from 46μm to 250μm. The fundamental wavelength of 1.064μm was used to measure KIO3 crystal powder SHG. The test result shows that KIO3 crystal powder has the phase-matching characteristics, which is consistent with the previous reports. The nonlinear coefficient d2ω of KIO3 crystal powder obtained by simulating the experimental curve is 9.7×10-12m/V. The simulation value agrees with d32 of KIO3 crystal reported previously. This method is proved feasible and could be used in the study of nonlinear characteristics for other crystal materials.
刘桂香, 鲁毅, 金香. 粉末倍频系数的模拟研究[J]. 应用光学, 2009, 30(3): 457. LIU Gui-xiang, LU Yi, JIN Xiang. Simulation on powder nonlinear coefficients[J]. Journal of Applied Optics, 2009, 30(3): 457.