查询词典 Nd

A harmonic of Nd:YAG laser(532 nm) pumped barium nitrate crystal in external resonator and excited stimulated Raman laser.Experimental setup adopted the Raman shifter consisted of external cavity and two prisms spectrometer.The external cavity was composed of diachronic mirrors with optimal reflectivity for Stokes components.

采用单端泵浦的外置拉曼振荡腔与双棱镜分光装置进行了硝酸钡晶体拉曼激光实验，泵浦源为倍频Nd： YAG的532 nm激光，硝酸钡晶体通过水溶液降温法生长，尺寸为10 mm×10 mm×48 mm，采用特殊镀膜的腔镜对各阶斯托克斯光进行优化选择。

A harmonic of Nd:YAG laser (532nm) pumped barium nitrate crystal in external resonator and excited stimulated Raman laser. Experimental setup adopted the Raman shifter consisted of external cavity and two prisms spectrometer. The external cavity was composed of diachronic mirrors with optimal reflectivity for Stokes components. Barium nitrate crystal was grown by the aqua-solution cooling method with the size of 48mm×10mm×10mm.

采用单端泵浦的外置拉曼振荡腔与双棱镜分光装置进行了硝酸钡晶体拉曼激光实验，泵浦源为倍频Nd：YAG的532nm激光，硝酸钡晶体通过水溶液降温法生长，尺寸为10mm×10mm×48mm，采用特殊镀膜的腔镜对各阶斯托克斯光进行优化选择。

It is found that the output mirror transmissivity of the two cavities keep a certain relation when the beam radii of pump laser, 1064 nm laser and 946 nm laser in the Nd: YAG crystal are well matched.

结果表明，当Nd：YAG晶体中抽运光，1064，946 nm激光的光束半径达到合理匹配时，两个子腔的输出镜透过率之间有确定的关系。

Cases were cuted by Nd:YAG laser called laser group, while the insertion group of 28 cases and the control group of 30 ones were each treated by different methods that eustachian tube insertion under nasal endoscope and eustachian tube blowing, and the effect of the three was evaluated.

其中26例施行Nd：YAG激光鼓膜造孔术治疗，为激光组；28例施行鼻内镜下咽鼓管置管术治疗，为置管组；30例施行传统的咽鼓管吹张术治疗，为对照组。

Objective To study the technique of using Nd:YAG laser in treating after-cataract in outpatients and to prevent complications.Methods According to the thickness of membrane to choose laser power.The methods of capsulotomy were crossed,horizontal,vertital,can-opening or circular along papillary margin.

回顾分析我院门诊对74例98眼后发性白内障患者进行Nd：YAG激光后囊切开术，探讨根据膜的厚薄选择激光能量，分别采用&十&字切开（若后囊有张力者行张力线切开）、横形、纵形切开及环形或瞳孔缘开罐式切开方法。

By using Xenon flash pumped, Cr4+:YAG Q-switched Nd.YAG cavity as thepump source, an intracavity KTP-OPO system lasing at 1.57 u m wavelength is realized. Output performance for different Cr4+:YAG small signal transmissions and different 1.57 u m output transmissions is demonstrated.

实验研究了氙灯泵浦、Cr~(4+)：YAG被动调Q的1.06μm Nd：YAG激光器的静态和动态输出特性，分析了1.06μm探索了泵浦外腔OPO系统所需的单脉冲输出条件。

Photo-cathode superconducting accelerator experiment system includes Nd:YAG mode-locked laser, Cs 2Te cathode, 2+1/2 RF gun, L band 3.5MW microwave source, 1.3GHz superconducting cavity, 500W continuous microwave source, coaxial input coupler, 4.2K cryostat, helium liquified system, control system, beam diagnosis system, and vacuum system.

光阴极超导加速器实验系统由四倍频 Nd：YAG锁模激光器，Cs2 Te光阴极，2 +1 / 2微波电子枪，L波段 3 。5 MW脉冲微波源，1 。3 GHz单腔超导铌腔，5 0 0 W连续微波源，超导腔束管耦合器，4 。2 K低温恒温容器，液氦制冷系统，同步控制系统，束流参数诊断，真空系统等构成。

The hydraulic loss of conduit in both vertical pump system and bulb tubular pump system were calculated using the numerical simulation, and the influence of pump impeller diameter on hydraulic loss of conduit was analyzed. Based on the similitude rules of impeller pump, the relationship between pump impeller diameter and nD value and the influence of pump selection and design were analyzed.

采用数值计算的方法，分别计算了具有不同水泵叶轮直径的立式轴流泵装置和灯泡贯流泵装置的流道水力损失，比较了水泵叶轮直径对流道水力损失的影响；根据叶片泵的相似律，分析了在一定设计流量条件下水泵叶轮直径与nD值的关系以及对水泵选型设计的影响。

By analyzing the characteristic of transition and corresponding stimulated-emission cross section in Nd:YAG crystal, according to the coupling condition of energy transition and material-determined wavelength, reasonable coupling parameters of laser rod and cavity mirrors were designed.

通过分析Nd：YAG的跃迁谱线和相应的受激发射截面的特点，根据多跃迁谱线激光材料波长选择的耦合率条件，合理设计激光棒和腔镜的耦合率参数。

In addition, the Nd:YVO4 laser material was pumped by one CW LD, and its absorb spectrum was measured. Using direct-coupled pump and the optical couple system, we obtained 240 mw and 130 mw output power respectively.

另外，采用Nd：YVO_4为激光介质，测定了它的吸收光谱和偏振方向，用一个LD泵浦，分别采用面对面的直接紧贴泵浦技术和经过准直、整形、聚焦系统，得到了240mW和130mW的绿光输出。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。