second harmonic

A real-time pulse-width measuring instrument using grating sampling second harmonic method

光栅取样二次谐波法脉宽实时显示仪

Theoretical analysis of cerenkov second harmonic generation in proton exchanged c-cut MgO: LiNbO_3 optical waveguides

c-切MgO：LiNbO3质子交换平板波导中切伦科夫倍频的理论分析

Based on the coupled mode theory, second harmonic generation ( SHG) in the form of Cherenkov radiation from a channel waveguide has been investigated taking the propagation loss into account.

基于耦合模理论，分析了考虑传输损耗的条形波导中切伦科夫（Cherenkov）二次谐波（SHG）的问题。

Superharmonic imaging is made for biological tissues and compared with the results from fundamental and second harmonic imaging.

对生物组织进行了超谐波成像，并与基波、二次谐波图像对比。

Second harmonic injection for restraining third-order intermodulation in traveling wave tube

行波管中二次谐波注入对三阶互调的抑制

Methods After intravenous administration of contrast agent, fundamental imaging, second harmonic imaging and IUI were used to evaluate the blood perfusion of tumors of liver in ten rabbits.

方法经静脉注射氟碳微泡造影剂后，应用基波显像、间歇式显像观察兔肝VX2肿瘤血流灌注。

By using coupled-mode equation, the formula for conversion efficiency of Cerenkov second harmonic generation ( CSHG) is deduced in this paper.

从耦合模方程出发，推导了切伦科夫倍频转换效率公式，并得出该效率主要是由交叠积分决定的结论；

In order to suppress the heat effect of blue laser using planoconcave cavity when working, use Thermal Energy Converter ( TEC) to control the temperature of gain medium Nd: YAG crystal and SHG ( Second Harmonic Generation) LBO crystal.

为了解决平凹腔蓝光固体激光器晶体在工作中因热效应问题产生的影响，针对激光的增益介质Nd：YAG晶体和用以倍频的LBO晶体，采用半导体制冷器（TEC）准确控制其工作时的温度。

Experimental Study of Cerenkov Type Second Harmonic Generation in Proton-Exchanged Lithium Niobate Planar Waveguides

铌酸锂质子交换波导中切伦科夫倍频实验研究

Testing Method of Negative Sequence Load-flow Blocked Rotor Second Harmonic Turn-to-Turn Fault Protective Relay

负序功率方向闭锁转子二次谐波匝间保护的调试方法

Objective To assess the dynamic contrast enhancement of hepatic VX 2 tumor using second harmonic imaging.

目的观察兔肝脏VX2肿瘤在二次谐波声学造影中的增强效果及动态变化时相。

The principal resonance of a second-order stochastic oscillator under combined harmonic and parametric excitations is investigated.

研究了二阶线性系统在谐和与随机噪声联合作用下的主共振响应和稳定性问题.

Objective To investigated the nursing of second harmonic myocardial imaging.

目的超声二次谐波心肌造影的护理配合.

Second Harmonic Generation of Nonlinear Optic Crystal Potassium Lithium Niobate

非线性光学晶体铌酸钾锂的二次谐波产生

The characteristics of proton-exchanged MgO: LiNbO_3 waveguides used for Cerenkov second harmonic generation

切伦科夫倍频用质子交换MgO∶LiNbO3波导性能研究

Nonlinear susceptibility tensor for the sum frequency generation is derived and validated in the second harmonic generation.

推导得出对于和频情况下的非线性极化张量的表达式，并应用于倍频情况进行了验证。

Study on the third harmonic generation induced by the second-order cascading in nonlinear photonic crystal

光子晶体中二阶非线性过程产生三次谐波的研究

Research on the Influence of Photobleaching Process on Polymer's Second Harmonic Generation and Thermo-Optic Effect

利用光学方法进行漂白光漂白对聚合物二次谐波和热光效应的影响研究

The paper analyzes the parameters influence on absorption curve and second harmonic wave.

分析了各主要参数的变化对气体吸收曲线与二次谐波波形的影响。

Second-harmonic compensation method and capacitor-voltage time-sharing control scheme for a double conversion UPS rectifier

双变换UPS中PWM整流器的二次谐波补偿和电容电压分时控制

The DC biasing current has been calculated in detail, which will go through the converter transformer winding in BTB DC system due to unbalance firing and the second harmonic voltage of positive sequence on the AC converter bus.

根据背靠背直流系统的技术特点，详细计算了由于触发不平衡和交流系统正序二次谐波在换流变压器中产生的直流偏磁电流。

Through second-order perturbation approximation and modal expansion approach, the second-harmonic generation of a primary Lamb wave propagating in layered structures has been analyzed, and the general solution to second-harmonic displacement fields has been obtained.

采用二阶微扰近似和模式展开方法，对分层结构中兰姆波的二次谐波发生问题进行了深入研究，得到了二次谐波声场的一般表达式。

This pulse was converted to the second-harmonic wavelength 315 nm in BBO.

这个光脉冲再经过BBO晶体 倍频为315nm的紫外光.

An input coupler for the Ka-band second harmonic gyroklystron is proposed and studied using three-dimensional electromagnetic code in this paper. High mode purity of a circular TE_ ( 021) mode in an input cavity is obtained.

研究结果表明，该输入耦合器具有较高的能量耦合效率，并能在Ka波段获得高纯度的TE021谐振模式。

Femtosecond Pulse-Second and Third Harmonic Generation with BBO

BBO晶体中飞秒脉冲的二次和三次谐波振荡产生

In this method, the intensity shape of a single shot femtosecond pulse second harmonic is acquired with a linear CCD, using the trigger mode of one trigger per line.

该方法采用线阵CCD作为光电传感器，用单行单次的同步触发方式，将一次触发的fs脉冲激光的二次谐波光强分布采集下来。

Compensation for effect of third-order nonlinearity on second harmonic generation of ultrashort pulses

超短脉冲倍频中三阶非线性效应的影响及补偿

Twenty seven disubstituted phenyl benzoate compounds were designed and synthesized, and their powder second harmonic generation ( SHG) were measured by the Kurty-method.

本文设计，合成了二十七种二取代苯甲酸芳酯类化合物，测定了它们的粉末倍频效应，初步讨论了该类化合物的结构及其非线性光学性质的关系。

Powder Second Harmonic Generation of Disubstituted Phenyl Benzoate Derivatives

取代苯甲酸芳酯类化合物的粉末倍频性能的研究

The Crystal Structure and the Second Harmonic Generation Efficiency of the Sulfosalicylate

磺基水杨酸盐的晶体结构和倍频效应