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折射

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Taking the nonlinear refraction and the nonlinear absorption into account simultaneously, this paper investigated the diffraction theory model of the Z-scan technique, and analyzed the features of Z-scan curves and their variation rules.

在同时考虑非线性折射和非线性吸收的情况下,借助光的衍射理论,研究了Z-扫描技术的衍射理论模型,分析了非线性折射和非线性吸收同时存在时Z-扫描曲线的形状特征和变化规律。

Critical angle of refraction - semi-circular cylindrical mobile light source, the incident angle change the size of refraction angle to change at this time, when the refraction angle = 90 degrees, which is critical at this time angle of incidence angle, the critical angle of water at 40 degrees large about anything mobile source of water in the water screen that is a reflection of light, a phenomenon that total reflection.

折射的临界角定义:光折射角=90度时,入射角即为临界角,按二方法,将半导体激光光源去掉铁夹,吸附在右下角的铁板上入射光对准中心,即产生折射光线,沿半圆形柱面移动光源,改变入射角的大小,这时折射角也改变,当折射角=90度时,这时入射角即为临界角,水的临界角大的在40度左右,再做移动光源在水中的水屏即出现反射光线,这种现象称全反射。

Theoretical analyses show that the BRF has the maximum tuning rate when the optic axis is located on the cone with its symmetric axis being on the refracted ray and apex of 45°; and the rejection of unwanted wavelength of BRF becomes the maximum when the optic axis is in the plane which contains the refracted ray and makes the angle of 45° or 135° with respect to the incident plane.

分析表明当晶片光轴处在以折射光线为轴线、顶角为45°的圆锥面上时,双折射调谐器具有最快的波长调谐速率;当光轴位于过折射光线并与入射面成45°或135°的平面内时,调谐器抑制非所需波长的能力最强。

Basing on electromagnetism theory characteristic of light wave, the formula of the relation of refringence e light is inferred under any axis location and any angle, when it is refracting.

基于平面光波在晶体中传播的电磁理论特性,推导了光波在晶体表面折射时,双折射光波中e光线透过晶体出射点的位置受到任意光轴取向、任意入射角影响的关系式;利用MATLAB对关系式进行了数值计算分析,绘出双折射e光与任意光轴取向、任意入射角关系曲线,并给出了对应的定量关系式;实验验证了该公式是正确的。

According to the principle of seismic refraction method, the formulas o f the depth and the thickness of the high-speed masses of rock are established using seismic refraction wave reversed and unrepressed time-distance curve and seismic refraction wave raypath theory in this paper.

根据浅层折射波方法原理利用浅层折射波相遇时距曲线与折射波射线路径关系建立了求取浅层高速埋伏岩体的埋深及其厚度的计算模式,利用这些公式可以较准确地确定高速埋伏岩体的位置、埋深及其厚度,对工程地质勘察是十分有利的。

A new type of high-birefringence photonic crystal fiber is brought forward, and the method introducing circinal holes with different sizes or elliptical holes which is used to design high-birefringence photonic crystal fiber is replaced by introducing fluorine-doped solid circles.

提出了一种新结构的高双折射光子晶体光纤,通过引入掺氟实心圆的方式形成双折射,而不采用大多数高双折射光子晶体光纤中引入不同孔径空气孔或椭圆空气孔的结构。

From Maxwell's equations, with material constitutive relation of optically active crystal and boundary conditions of electric field on the boundary between isotropic media and crystal, through coordinate transformation, the formula of the direction of refracted wave for arbitrary direction incident monochromic plane wave was derived. Furthermore, based on the unit vector of direction of refracted wave, eigen waves of electric field, electric displacement vectors and direction of energy flow can be easily obtained.

从麦克斯韦方程组出发,结合旋光晶体的物质方程以及单色平面波从各向同性介质入射到晶体界面时电场的连续性边界条件,通过晶体主轴坐标系和界面坐标系的坐标变换,推导了任意入射方向的单色平面波在晶体界面上的折射方向的求解公式,进而利用所得的折射方向求解晶体中折射波的电场本征模、电位移矢量本征模和光线方向。

Based on the laser longitudinal mode splitting theory, a novel scheme of dual-frequency laser with large frequency-difference is presented using electrically controlled birefringence of liquid crystal, and the transmitted resonant mode splitting by birefringent of Fabry-Perot etalon has been analyzed theoretically. A new element of liquid crystal Fabry-Perot etalon is designed and fabricated, which serves as aselector and splitter of both laser longitudinal modes and Fabry-Perot etalons transmitted resonant modes. Two different experimental systems of laser-diode end-pumped Nd:YAG laser have been set up using two different LDs, and the transmission of liquid-crystal cell have been measured. When the empty LCFP is inserted in the cavity of high-power LD pumped Nd:YAG laser, the oscillation of a single laser longitudinal mode have been observed, such a result shows that the designed and fabricated LCFP element is capable of selecting single axial mode. While an anti-reflected liquid crystal cell is inserted in the cavity of Nd:YAG laser end-pumped by the high-power LD, it is difficult to confirm weather the laser longitudinal modes have been spitted or not. The subject is summarized in this thesis and the improvement of the project has been presented.

论文以激光纵模的分裂理论为基础,提出了可望获得几十GHz甚至上百GHz的液晶电控双折射双频Nd:YAG激光器的总体方案,并对用双折射效应分裂F-P标准具透射谐振模进行了理论分析;设计并加工了一种集激光纵模选择、激光纵模分裂和F-P标准具谐振透射模分裂于一体的多功能元件——液晶电控双折射F-P标准具;建立了两种不同功率激光二极管端面泵浦的Nd:YAG激光实验系统,并对液晶盒的透射性质进行了测试;将未灌注液晶的空液晶F-P摘要标准具插入大功率LD泵浦Nd:、叭G激光谐振腔内,观察到了单纵模激光输出,说明所设计和加工的液晶F一P标准具具有纵模选择能力;将镀有增透膜的液晶盒插入大功率LD泵浦Nd八7AG激光谐振腔内,是否产生了激光纵模分裂现象还难以确定。

Currently, almost all the corrections of radar wave refraction error are based on the assumption that the atmosphere is homogeneous in the horizontal direction, and the azimuth error in the measurement of radar is not corrected.

目前进行的雷达电波折射误差修正,几乎都是建立在假设大气在水平方向均匀的条件下,认为雷达测量的方位角无折射误差,其对于下垫面均匀的平坦地区是可行的,但下垫面复杂地区方位角的折射误差必须修正。

The tempral properties of the nonlinear refraction in Cadmium porphyrin and Methyl orange areproposed by pump-probe technique.It can be used as all optical switch based on nonlinear refractioneffect.It was numerical simulated and analyzed theoretically.

利用泵探技术测量了类卟啉镉氯仿溶液和甲基橙水溶液非线性折射效应的时间特性,并指出这一效应可用于实现折射型全光开关,从理论上分析了双光束技术折射效应的时间特性。

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