Y3Al5O12：Eu^3＋磷光体的溶胶—凝胶法合成及发光特性

以金属烷氧基化合物为原料．采用溶胶-凝胶法在1000℃下合成了Eu^3 掺杂的Y3Al5O12(YAG)磷光体。利用TG-DSC，XRD和发光光谱等对样品进行了表征。结果表明，YAG：Eu^3 的晶相形成温度为991℃。Eu^3 在非晶态和晶态YAG中的发射光谱有明显差异。研究了Eu^3 含量和烧结温度对Eu^3 的^5D0→^7F1和^5D0→^7F2发射峰强度的影响。随煅烧温度的升高和Eu^3 浓度的增加，Eu^3 发射峰强度增强。     

激光微加工技术在ICF中的应用

建立以二极管泵浦的Nd：YAG连续固体激光器为基础的微结构加工平台。激光器谐振腔输出基横模，输出波长1064nm，采用调Q技术压缩脉宽，激光器输出峰值功率大于10w，可选择连续及脉冲工作方式。     

Time-Resolved Femtosecond Degenerate Four-Wave Mixing in LiNbO3：Fe,Mg Crystal

Forward degenerate four-wave mixing （DFWM） processes are investigated with a femtosecond pulsed laser in lithium niobate crystal doubly-doped with magnesium and iron （LiNbO3：Fe, Mg）. The pulse energy dependence reveals a pure third-order nonlinear response, and the third-order nonlinear susceptibility x^（3） in the material is evaluated to be 4.96 × 10^-13 esu. The time-resolved DFWM process shows a response time of x^（3） shorter than 100fs, which is due to the nonresonant electronic nonlinearities. Our results indicate that LiNbO3 crystals have potentials for ultrafast real-time optical processing systems, which require a large and fast x^（3） optical nonlinearity.     

Experimental 511 W Composite Nd：YAG Ceramic Laser

We demonstrate a 511 W laser diode pumped composite Nd：YAG ceramic laser. The optical pumping system is consisted of five laser diode stacked arrays arranged in a pentagonal shape around the ceramic rod whose size is φ6.35×144mm. When the pumping power is 1600 W, the cw laser output up to 511 W at 1064nm can be obtained with a linear piano-piano cavity, and the optical-to-optical efficiency is 31.9%. To our knowledge, this is the highest value of laser output by using a newly invented composite Nd：YAG ceramic rod as the gain medium.     

关于高斯定理和电场叠加问题的再讨论

静电场由于有高斯定理和场强叠加原理，所以可采用两种不同途径求解电场。本文简明准确地论述了采用这两种不同途径时分别应注意的事项，并澄清了一些错误的看法。     

Simulation of Patterns and Qualitative Analysis of Pattern Rotation in an End-Pumped Nd：YVO4 Laser

We simulate some laser output patterns observed in our previous experiment employing superposition of Laguerre- Gaussian modes. The rotating pattern is qualitatively analysed from the point of contemporary spatial burning hole effect of the lasing crystal.     

纳米CeO2：Er荧光粉的光声光谱和荧光光谱研究

采用燃烧法合成了CeO2：Er纳米荧光粉，研究了不同粒径大小的CeO2：Er的晶型和晶貌并对该现象进。TEM结果表明无定形CeO2：Er包围着纳米晶CeO2：Er，可起到表面修饰的作用。光声光谱在保持纳米材料表面状态不改变的前提下，分析了不同粒径的CeO2：Er的光谱性质，解释了随纳米粒径减小CeO2光谱峰吸收峰有蓝移而Er^3 没有明显谱峰位移的原因。在荧光光谱中，发现小粒径的CeO2：Er有较大的红绿发射比，行了解释。     

SSCH3光解离的多参考理论计算

摘要运用多参考微扰理论(Multireference MΦller-Plesset theory)计算了SSCH3垂直激发能及其S-C与S-S两种断键方式的绝热(Adiabatic)与非绝热(Diabatic)的基态和激发态势能曲线, 研究了在193nm激光作用下SSCH3的光解离过程, 理论计算值与实验值相符.