LD泵浦Nd:YVO4晶体KTP腔内倍频红光激光器

报道了激光二极管泵浦Nd∶YVO4晶体,Ⅱ临界相位匹配KTP晶体腔内倍频红光激光器.通过对激光晶体热效应的考虑,设计了热不灵敏腔 ,最大获得了273mW 671nm红光输出.     

激光二极管抽运Nd∶YVO4/LBO红光激光器研究

报道了激光二极管抽运的Nd∶YVO4晶体、LBO晶体Ⅱ类非临界相位匹配腔内倍频大功率红光激光器。通过对激光晶体热效应的考虑 ,设计了热不灵敏腔 ,采用低掺杂浓度Nd∶YVO4晶体 ,获得了 6 71nm红光的最高输出为890mW。     

高温空气的输运性质

气体或气体混合物的粘性系数,热传导系数等的理论计算方法最初是从平均自由程理论开始的,例如Jeans,Kennard等.后来Enskog和Chapman建立了求解Boltzmann方程的严格的动力学理论,其中最具代表性的工作有Chapman&Cowling及Hirschfelder,Curtiss & Bird等。虽然有不少作者提出了各种求解Boltzmann方程的近似办法,例如     

二维高超声速钝体激波层紫外辐射的实验观察

利用光学多道分析仪，在JF-10氢氧爆轰驱动高焓激波风洞上测量了二维钝体驻点的发射光谱．实验结果表明，在200-280nm的波长范围内，辐射主要来自N0的γ系，同时还分辨出了0H的A-X跃迁、N2^ 的B-X跃迁和烧蚀金属的原子线辐射．     

LD泵浦Nd∶YVO_4晶体KTP腔内倍频红光激光器

报道了激光二极管泵浦 Nd∶YVO4 晶体 , 临界相位匹配 KTP晶体腔内倍频红光激光器 .通过对激光晶体热效应的考虑 ,设计了热不灵敏腔 ,最大获得了 2 73 m W671 nm红光输出     

Laser-Induced Particle Jet and Its Ignition Application in Premixed Combustible Gases

A hot particle jet is induced as a laser pulse from a free oscillated Nd：YAG laser focused on a coal target. The particle jet successfully initiates combustion in a premixed combustible gas consisting of hydrogen, oxygen, and air. The experiment reveals that the ionization of the particle jet is enhanced during the laser pulse. This characteristic is attributed to the electron cascade process and the ionization of the particles or molecules of the target. The initial free electrons, which are ablated from the coal target, are accelerated by the laser pulse through the inverse Bremsstrahfung process and then collide with the neutrals in the jet, causing the latter to be ionized.