微波等离子体炬离子／原子荧光光谱研究：稀土元素铕的离子／？…

文中用微波等离子体炬作离子／原子化器,强短脉冲供电空心阴极灯作激发源,进行了稀土元素的离子／原子荧光检测。详细研究了系统对Ｅｕ检测时的最佳工作条件,对微波等离子体功能,空心阴极灯电流,观测高度等因素对Ｅｕ离子／原子荧光信号的影响进行了讨论测量了离子荧光和原子荧光谱的检测限。     

Mn（Ⅱ）,Co（Ⅱ）与HSA相互作用的荧光光谱研究

用荧光光谱法研究了生理ｐＨ和等离子点（ｐＨ＝５．３０）时Ｍｎ（Ⅱ）、Ｃｏ（Ⅱ）与ＨＳＡ的相互作用。根据Ｆｏｒｓｔｅ非辐射能量转移理论,得到了不同ｐＨ时Ｍｎ（Ⅱ）、Ｃｏ（Ⅱ）在ＨＳＡ中的第一强结合位置与Ｔｒｐ－２１４残基间的距离。这一结果远大于文献报道值,根据Ｍｎ（Ⅱ）、Ｃｏ（Ⅱ）在ＨＳＡ中的结合部位及ＨＳＡ的畴结构对这一显著差异进行了讨论。     

波长40—60nm的高电离态硫离子某些能级跃迁谱线的实验研究

波长４０－６０ｎｍ的元素高电离态离子光谱实验中,观测到１０多条光谱线,这些谱线是ＳＸＩ到ＳＸⅣ离子的一些激发能级发射的,其中９条谱线还没有人报道实验结果,实验分析结果与理论符合得较好。     

Dopant dimension influence on polyaniline film structure

Received: 25 February 1998 / Accepted: 28 May 1998 / Published online: 24 February 1999     

THOMSON SCATTERING MEASUREMENT OF LASER-HEATED PLASMAS

Experiment on characterizing the laser-heated plasmas using Thomson scattering measurement has been carried out. An incoherent Thomson scattering system with a 90° scattering angle has been established. The influence of the gas density and the pumping laser energy on the temperature of the laser-heated plasma has been examined. The results show that the temperature of the laser-heated plasma increases with the increase of pumping laser energy and the plasma density, which agrees well with the explanation of inverse Bremsstrahlung absorption.     

超短脉冲激光再生与多程放大器的理论分析与实验建立Ⅰ.理论部分

从半经典理论的麦克斯韦－布洛赫方程出发,对种子激光脉冲在再生和多程放大器中的放大过程进行了分析,结合实际的物理条件得出了放大器的峰值输出的解析表达式。     

非线性延时修正光纤孤子方程的稳态解问题Ⅱ.漂移型扭结孤波解

利用一种与Ｂｃｈｌｕｎｄ变换有关的方法严格求含非线性延时项光孤立子方程,得到了该方程的漂移型扭结孤波解,并讨论了解的极限性质和相关物理问题。最后指出了该方程在γ＝０处的参数不稳定性问题     

激光二极管泵浦的准连续运转飞秒Cr:LiSAF激光器

报道国内第一台用６７０ｎｍ激光二极管泵浦的准连续锁模运转的Ｃｒ：ＬｉＳＡＦ激光器。对于连续运转,泵浦阈值功率２４０ｍＷ,当吸收功率为３６８ｍＷ的输出,输出波长８５０ｎｍ,斜效率为３．５％。在准连续运转（１００ＨＺ,占空比１／５时）,泵清阈值功率４５ｍＷ,斜效率为９．８％,用染料作为锁模妄动介质,实现了准连续锁模运转,光脉冲输出的中心波长为８５０ｎｍ。     

Heat transfer for diode side-pumped YAG slabs

Thermal heating is a major limiting factor in scaling the average power of a solid-state laser. The heat transfer coefficient is affected by the coolant flow rate, the physical properties of the laser slab and the coolant, and the pumping cavity geometry. The relationship between the heating effects and the heat transfer coefficient has been studied by considering the variations of thermal conductivity and expansion coefficient of the laser slab with temperature. It is concluded that different heat transfer coefficients should be adopted according to different heat intensities inside the laser slabs in order to obtain better pumping input as well as to optimize the cooling effects.     

多程放大器光束空间分布的优化设计

This paper focuses on measuring straightness of large-scale dimension by using laser diode fiber alignment, diffraction imaging technique and a CCD camera. In this method, we use a laser diode fiber alignment beam as the datum reference of straightness, deviation of the measured from this datum, can be detected by a CCD camera directly. Also a novel image processing algorithm is presented. The experiment result shows that the measurement range of L (m), the measurement accuracy of the system is 3+2.3×10-6L(\mm).