查询词典 laser

Laser diode-pumped Nd∶YVO4 self-stimulated Raman laser .

激光二极管抽运的自拉曼Nd∶YVO4激光器。

It is very important to reveal the characteristic of nonlinear small-scale self-focusing of broadband laser experimentally, and it is also of great theoretical and practical significance for the development of high-power laser system.

本文在利用解析和数值方法研究宽带激光自聚焦规律的基础上，通过搭建具体的实验平台，进一步从实验上研究了宽带激光小尺度自聚焦的动态传输过程。

Self-fluxing Fe-Cr-Ni-B-Si alloy prowders are laser clad on medium carbon steel substrate of dimensions 80×35×10mm〓. The investigation results of this clad layer are: micro-defects, micro-cavity and occluded forin substance, are the micro-cracks and crack resourses in clad layer; crack of coating propagates along the boundary of two kinds of eutectic sutructure; The included angle θ between the cracking direction and laser scanning direction in multitrack overlapping clad is smaller than that in one-track clad because of crack propagating along crystalline growth direction and crystalline direction in overlapping zone being different from it in one-track clad.

在调质态的45〓钢表面，采用预置粉末法进行FeCrNiBSi合金的多道搭接激光熔覆，对其熔覆层进行分析表明：多道搭接激光熔覆层裂纹扩展方向与激光扫描方向间的夹角θ与单道熔覆时相比明显变小，前者θ0°，后者θ角基本都为90°，这主要是因为多道搭接时，搭接区结晶方向发生了变化以及裂纹沿结晶方向扩展所致；激光熔覆层裂纹大多是以覆层与基材交界面的孔洞、熔覆层内不同方向共晶团间的显微缩孔、夹杂物的边界等三种显微缺陷作为裂纹源，并沿低熔点物相形成元素偏析造成弱化膜的共晶团界面扩展延伸。

In laser welding, focusing characteristic s of laser beam are the key factors in determining the quality of the welding seam.

激光焊接中，激光聚焦特性的好坏是影响焊接质量的关键因素。

It is included the energy spectrum and angular distribution of hot electrons generated by ultrashort laser-solid interaction, the effect to electron behavior of electrical conductivity of target material, the hot electron activities and plasma characteristics in various plasma scale length, the rule of electron movement related to the high harmonic generation in gas, the excelled calculation about the condition of high harmonic generation, the study of electron spectrum and ion spectrum generated by Coulomb explosion in laser cluster interaction.

其中包括超短脉冲激光与固体靶作用中超热电子的能谱和角度分布，靶材料的电导率对电子行为的影响以及在不同的密度标长条件下超热电子和与电子相关的等离子体特征；超短脉冲激光与气体靶相互作用中与高次谐波相关的电子的具体运动规律和产生短波长高次谐波的优化条件；超短脉冲激光与团簇原子相互作用中通过对电子的隧道电离而引起的库仑爆炸等。

Furthermore, under condition of larger and stable laser energy output, the modified main-switch still inherits the high-voltage resistance of ring-small disk main-switch supported by circular metal pipe, and keeps laser beam with narrow pulse width.

改进的主开关在获得稳定而较大输出能量的情况下仍然继承了金属圆筒支座圆环-小圆盘型主开关的高耐压性，同时保持了激光束较小的脉宽。

Then some improvements which bestow the cavity with certain characteristics are achieved on the basis of the original laser. There are more adjustment factors, such as the detuning of gratings and the length of the cavity. The resonance cavity can make use of each other better, and the synchronization of the dual-wavelength laser can be improved.

然后我们在原有激光器的基础上做了一些改进，改进后的腔具有的优点有：腔的调整因素有所增加，比如镜的失调，腔的长度；同时可以改变两谐振腔的相互利用情况，以便更有利于双频激光的同步运行。

Shanghai SHENFEI Laser Opitcal System LTD.is a hi-tech enterprise,ehich was jointly founded by Shanghai Institute of Laser Technology,Shanghai Technology Creation LTD.Shanghai Technology Investment Co.as well as main managers.The hi-tech products manufactured by this company:The glass master substrates used for grating and reflector mirror,optical glass and tourist souvenir.

上海申菲激光光学有限公司是由上海激光技术研究所、上海科技创业有限公司、上海科技投资公司和企业主要经营者群体合股组成的高新技术企业，主要生产经营的高科技产品有：激光光盘母盘玻璃LD、 CD、 VCD 、DVD、 CD-ROM、 HD等系列基片，各类光学仪器用光栅、刻度盘、反光镜等玻璃基片，光学玻璃与金属镶嵌的旅游纪念品等。

Orientation of the future development of the company: dedicated to the specialists in tailoring solutions to the material cutting sector, and development of a series of internationally advanced quality of cutting machines: a series of hi-tech computerized tailoring machines such as paper sample cutting machines, carton and paper box proofing machines, tailoring machines, costume computerized tailoring machines, water jet cutting machines, laser cutting machines, laser engraving machines, X-raying foreign object detectors.

公司未来发展方向：致力于材料切割行业的裁切方案解决专家，开发出一系列具有国际先进品质的切割机：纸样切割机、纸箱纸盒打样机、裁批机、服装电脑裁床、水刀切割机、激光切割机、激光雕刻机、X光透视异物检测机等一系列高科技电脑裁切设备。

Orientation of the future development of the company: dedicated to the specialists in tailoring solutions to the material cutting sector,development of a series of internationally advanced quality of cutting machines: a series of hi-tech computerized tailoring machines such as paper sample cutting machines, cartonpaper box proofing machines, tailoring machines, costume computerized tailoring machines, water jet cutting machines, laser cutting machines, laser engraving machines, X-raying foreign object detectors.

公司未来发展方向：致力于材料切割行业的裁切方案解决专家，开发出一系列具有国际先进品质的切割机：纸样切割机、纸箱纸盒打样机、裁批机、服装电脑裁床、水刀切割机、激光切割机、激光雕刻机、X光透视异物检测机等一系列高科技电脑裁切设备。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。