1)  laser ablation
激光离解
1.
The Effect of silver nanoparticles on laser ablation of PS and PMMA were studied by time of flight mass spectrometer.
采用激光飞行时间质谱研究了添加纳米银粒子的聚合物PS和PMMA的激光离解方式的变 化,发现纳米银粒子导致聚合物炭化,在两相界面有诱导石墨化的作用;而且纳米银粒子的这种作用与两相 的界面相互作用和结构有关。
2)  laser
激光
1.
Analysis model and experimental research of dilution in laser induction hybrid cladding;
激光感应复合熔覆的稀释率分析模型及实验研究
2.
The Reconfigurable Multifunction Laser Processing System Based on the Optimal Slice Process;
基于最优切片工艺的可重构多功能激光加工系统
3.
Study of laser transmission effect in dye-cholesteric liquid crystals;
激光在手性染料液晶中的传输效应研究
3)  lasers
激光
1.
Comparison of histologic,biochemical and mechanical properties of murine skin treated with the long-pulse and Q-switched 1 064-nm Nd:YAG lasers;
长脉宽与Q开关1064nm Nd:YAG激光对皮肤作用的比较
2.
Combined Application of Argon and Nd: YAG Lasers in Treatment of Primary Angle-Closure Glaueoma;
氩激光联合Nd:YAG激光治疗原发性闭角型青光眼
3.
Unification Single Mode Equation of Class-B Lasers with Homogeneous Broad Line;
B 类均匀加宽激光器单模方程的统一性
4)  laser beam
激光
1.
The results show that:①the transient field become quasi-steady state after the laser beam scans 2 pots ②the peak temperature and the temperature difference of upper-lower surface calculated by 2D FEM are close with that calculated by 3D FEM ③good agreement is obtained between experimental and analytical result
用小步距间歇跳跃式移动光源模拟激光束的连续扫描,采用简化模型,对板料激光成形时的三维瞬态温度场进行了有限元分析。
2.
The polarization of the laser beam output from the PHC-1 500 laser unit was experimentally verified.
试验验证了PHC-1500型CO2激光器输出激光经传输光路转换后的偏振化方向。
5)  He-Ne laser
激光
1.
Study of information transfer mechanism on interaction between He-Ne laser and bio-tissue;
He-Ne激光与生物组织相互作用的信息传递机理研究
2.
Nursing and clinical observation of the patients with herpes zoster treated by He-Ne Laser;
氦-氖激光局部照射对带状疱疹的疗效观察及护理
3.
The objective of this study was to determine the regulation effects of He-Ne laser on protein metabolism,photosynthesis of Isatis indigotica seedlings exposed to enhanced ultraviolet-B(UV-B) lesions.
以菘蓝(Isatis indigotica Fort)幼苗为实验材料,比较研究了He-Ne激光对增强UV-B(辐射强度:10。
6)  laser-assisted
激光
1.
Comparison of laser in situ keratomileusis and laser-assisted subepithelial keratectomy for myopia more than-10.00 diopters;
两种准分子激光手术治疗超高度近视的对比研究
2.
Stromal cells change after epipolis laser in situ keratomileusis and laser-assisted subepithelial keratectomy in rabbits;
微型角膜刀法与乙醇浸润法准分子激光角膜上皮瓣下磨镶术对角膜基质细胞影响的实验研究
3.
Recovery of corneal sensitivity after laser in situ keratomileusis and laser-assisted subepithelial keratectomy;
准分子激光原位角膜磨镶术与准分子激光角膜上皮瓣下磨镶术后角膜知觉恢复的研究
参考词条
补充资料:半导体激光泵浦的激光晶体


半导体激光泵浦的激光晶体
LD pumped laser crystal

  半导体激光泵浦的激光晶体LD PumPed lasercrystal适用于半导体二极管作泵浦源的激光晶体。传统的固体激光器一般用闪光灯泵浦,由于闪光灯的发光区域宽,只有一部分能量被吸收后转换成激光,大部分转换成热量,使工作物质温度上升,恶化了输出激光束的质量。半导体激光器输出的激光谱线窄(一般为几纳米),选择合适的半导体激光器,使其激光光谱与某种固体激光材料的吸收光谱匹配,即可达到高效泵浦,大大减轻固体工作物质的热负荷。 因为半导体激光器光泵区域小,需用的晶体尺寸也小,因此要求基质晶体内可掺入的激活离子浓度要高,且不产生浓度碎灭。此外,要求与光泵的半导体激光波长相匹配的晶体的吸收带要宽,吸收系数要大;要有低的阑值功率;Q开关运转时,荧光寿命要长。当泵浦光源从闪光灯改变为半导体激光二极管时,对被泵浦的激光晶体产生了不同的要求。用闪光灯泵浦时,对材料的热性能和机械性能有严格要求,而半导体泵浦则更注重材料的光谱性能。 在已使用的激光晶体中,掺钱石榴石(Nd:YAG)晶体的阑值功率低,光学质量高,是应用于半导体激光光泵的固体激光器的主要材料。由于Nd3+离子在基质晶体中受分凝系数的限制,Nd3+离子浓度不能太高,所以一些氟化物和钨、钥酸盐晶体等掺杂浓度高,激光效率高,荧光寿命长,有可能成为半导体激光泵浦的后选晶体。 用半导体泵浦可制成效率高、功率和频率稳定、激光束质量好、寿命长的全固化激光器,并经各种频率转换技术,可发展成各种波长、各种模式、各种运转方式的激光器,这种激光器将在很大范围内取代已有的各类固体、液体和气体激光器。 (沈鸿元)
  
说明:补充资料仅用于学习参考,请勿用于其它任何用途。