This work studied the fluxless reflow soldering of eutectic solder ball on copper pad utilizing pulse YAG laser. The effects of soldering conditions including laser power density, pulse width (i. e., the irradiation time) and reflow times on the morphology, microstructure and shear strength of solder joint were investigated.
本实验研究以脉冲式YAG雷射进行共晶锡球在铜焊垫上之无助焊剂回焊接合，以了解雷射功率、脉冲宽度与回焊次数等制程条件对焊点外观形貌、微观结构与接合强度之影响。
Methods:61 patients with the different laryngeal diseases included polyp nodule, paralysio of vocal cord, inflammatory granuloma pipilloma stenosis eyst, angiolymphangioma in laryns and lingual lymfphadenosis which were treated by Ho:YAG laser via fibsobranchocopy.
应用用Ho：YAG激光配合纤维喉镜，治疗喉部疾病包括声带小结、息肉、囊肿、炎性肉芽肿、喉乳头状瘤、舌根淋巴组织增生、喉狭窄、会厌囊肿、梨状窝囊肿、双侧声带麻痹及咽喉部淋巴血管瘤共61例。
Objective To evaluate the influence of power, irradiation time, pulse energy and frequency of pulsed Ho∶YAG laser on its biological effects.
目的 为研究平均功率、照射时间、脉冲能量、脉冲频率等激光参数对Ho∶YAG激光生物效应的影响。
By thermally bonding the YAG crystal with 2 mm thick Nd∶YAG crystal, the Porro prism supplies multi-functions such as laser amplification, closuring the light path, polarization sensitivity to the 946 nm and so on.
直角棱镜由无掺杂的YAG晶体和2 mm厚的Nd∶YAG晶体热键合形成，可提供激光增益、光路闭合及对946 nm激光起偏等多种复合功能。角锥棱镜由熔融石英材料构成，在环形永磁铁作用下，提供法拉第旋转作用。
In this paper, Q switch Nd:YAG laser was used to polishing the diamond films.
在理论分析的基础上，开展了激光切割和抛光金刚石膜的实验研究。
In this paper the construction and operation characteristics of a high power Nd r YAG laser system are described.
本文描述一台由两级Nd：YAG激光器组成的紧凑高功率激光系统的结构及其工作性能。
Objective To study effects of Nd:YAG laser on the wall ofroot-canal.
目的 观察Nd：YAG激光对根管壁的作用。
However, for patients with darker skin, Nd:YAG is the only safe option.
不过，对於患者与肤色较深，Nd ：YAG激光是唯一安全的选择。
Abstract］ Objective: To evaluate. the effect of Nd:YAG laser on direct pulp capping.
摘要］ 目的：观察研究脉冲Nd：YAG激光照射在直接盖髓术中的作用。
In Chapter 6, the rapid solidification transformation due to pulsed Nd: YAG laser irradiation is analyzed.
第六章研究了脉冲激光快速熔凝所生成的快凝组织的演化过程。
We are known professional company of Nd:YAG laser power supply.
本公司为国内知名的专业化Nd：YAG激光电源研发生产企业。
Is 网络游戏充值平台 to ramp; d of laser equipment such as yag laser markers, laser mould welding machines, laser spot welding machines, optical fiber laser markers, semiconductor markers, disq laser markers, co2 laser cutters, and general-purpose laser welding machines. at the same time, it provides automation system technical solutions.
华天世纪激光科技有限公司生产的产品主要有：yag激光打标机、激光模具焊队机、激光点焊机、光纤激光打标机、半导体激光打标机、disq激光打标机、co2激光打标机、500w全自动激光焊队机、500w金属激光切割打孔机等激光设备的研究与开发，并提供相应的自动化系统技术解决方案。
The technique of treatment of oral mucoid cyst with Ho:YA G laser is an effect and safe thearapeutics with the characteristics of excellen t homeostasis, improved visualization, minimal thermal damage to surrounding tissu e, shorter period of rescovery and easy to operate.
用Ho：YAG激光治疗口腔粘液囊肿，操作简便，定位准确，止血效果好，对周围组织损伤轻微，创面愈合快，比目前常用治疗口腔粘液囊肿的CO2激光和Ho：YAG激光疗效更佳，副作用更少。
The nanophase ZnO powders prepared by polymer-network gel system with diameter in the range of 30-50 nm have round shape, good dispersion and uniform distribution. Titanium terabutoxide system is best among achloride system、titanium terabutoxide system and stearic acid system. The nanophase rutile TiO_2 powders prepared by titanium terabutoxide system with diameter in the range of 40-60 nm have round shape, good dispersion and uniform distribution. Nanophase YAG powders are prepared by polymer-network gel system at 900℃.The form temperature of YAG is lower than solid phase reaction. The distribution of YAG powers is 10-30nm. Because the particles are fine, the particles have bad dispersion and a mass of agglomeration.
在硬脂酸体系、草酸体系、柠檬酸铵体系、高分子网络法体系制备纳米ZnO粉末中，高分子网络法体系制得的纳米ZnO粉末粒径最细，粒径范围在30-50nm之间，粒径分布最均匀，颗粒形状为球形，颗粒分散性较好；在TiCl_4体系、钛酸四丁酯体系、硬脂酸体系制备金红石相纳米TiO_2粉末中，钛酸四丁酯体系制得的TiO_2粉末粒径相对较小，粒径范围在40-60nm之间，颗粒形状为球形，颗粒分散性也相对较好；高分子网络法体系在900℃制备出了纳米YAG粉末，YAG的形成温度比固相反应法降低了约600℃，YAG粉末粒径范围在10-30nm之间，由于颗粒细小，分散性较差，颗粒彼此相连，有团聚的现象。
To research the relation of oil's laser induced fluorescence intensity and oil temperature, the third(355nm) harmonics pulsed Nd: YAG laser was used as the exciting source, and a multi-track spectrology as the detector, and the intensities of laser induced fluorescence of oil under different temperatures were measured.
研究一种应用较广的油的激光诱导荧光强度与其本身温度之间的关系。用输出波长为355nm的三倍频Nd：YAG激光器做激发光源，用多通道光谱分析仪进行接收探测。
Ten patients were treated with long pulse tunable 1064nm Nd:YAG laser.
所有患者均用可调长脉冲1064nm Nd：YAG激光治疗。
The Ramanscattering at 630 nm, induced by a 35ps second hamornic of YAG laser, ismeasured at different heights in the r -L direction. We fOund that the intensity ofthe Raman signaI does not change with the height, i. e.
如果用532nm的脉冲激光去激发乙醇，则其Raman散射信号在630nm，正好落在光子带隙内，通过实验证明Raman信号不随样品高度的变化而变化，即该Raman信号不受光子晶体带隙的影响。
The paper mainly analyzes the characteristics of YAG laser, free electron laser and TEA CO_2 laser, compares their average power, peak power, high single-pulse energy, and transmitting property in atmosphere. The result shows nowadays, TEA CO_2 laser is the most appropriate one at present to be used as the high power source in the field. It's power can reach 10kW level, single pulse energy can reach 0.5～1kJ, repetitive frequency is 20～40Hz, the laser wavelength lies in the atmospheric window, and it isn't sensitive to the atmospheric change. The laser work media flows fast, and it has no the thermal lens effect and damage threshold.
主要分析了目前YAG固体激光器、自由电子激光器和TEA脉冲CO2激光器的特点，通过上述4个方面性能的比较，认为在目前水平下，TEA脉冲CO2激光器是进行激光推进的首选强激光源，其优点表现在：功率可达10kW量级，单脉冲能量可达0.5～1kJ，重复频率为20～40Hz；激光波长处于大气传输窗口，对大气变化不敏感；工作物质快速流动，不存在热透镜效应和破坏阈值；相关光学元件易于制造；光束质量较好；运行成本低。
Nd:YAG laser irradition on the root surface of periodontal tooth before scaling and root planing reduced the level of AST and ALP in gingival crevicular fluid to a significantly lower level, which kept a prolonged decreasing tendency throughout the 8 weeks of observation.(4) The optical fiber of pulsed Nd:YAG laser was pliant and slender.
3C组先用Nd：YAG激光照射牙周炎患牙根面，再作根面平整术，使龈沟液内天冬氨酸转氨酶、碱性磷酸酶水平下降更低，并且在8周观察期内，呈持续下降趋势，更有效的改善牙周炎的炎症状况。
Application of the forcipressure to the CO_2 laser circumcision and Nd: YAG laser to the condyloma acuminatum was used.
因男性患者都有包皮过长的特点，采用了钳夹法CO＿2激光包皮环切术，Nd：YAG激光治疗尖锐湿疣，对治疗机理进行了讨论。