Energy-Pooling Collisions in Rubidium： 5P3/2 ＋ 5P3/2 → 5S ＋ （nl = 5D, 7S）

We experimentally study rubidium energy pooling collisions of Rb（SP3/2） ＋ Rb（5P3/2） → Rb（5S1/2） ＋ Rb （nlJ = 5DJ, 7S1/2） at low densities in a cell using diode laser excitation. The excited-atom density and spatial distribution are mapped by monitoring the absorption of a counterpropagating single-mode diode laser beam, tuned to the 5P3/2 → 7S1/2 transition, which could be translated parallel to the pump beam. The excited atom densities are combined with measured fluorescence ratios to determine cross sections for the rubidium energy pooling process. The cross sections for nlJ being 5D5/2, 5D3/2, and 7S1/2 are （1.32±0.59）×10^-14, （1.18±0.53）×10^-14 and （3.21±1.44）×10^-15cm^2, respectively.     

耐高温光刻胶光栅模板的制作与转移技术及其应用

作为试件变形传感元件的云纹光栅的制作是云纹干涉法的关键技术。本文提出了在１２０～２００℃高温下使用的光刻胶光栅模板的制作及在此温度下试件栅的复制工艺，并利用此技术研究了新型微电子封装组件在１２５～２０℃温度载荷下的热变形。实验结果表明：采用该方法可以获得高质量的试件栅，云纹条纹质量好，可用于试件微小区域内热变形的精确测量     

Single Photon Detector at Telecom Wavelengths for Quantum Key Distribution

Using InGaAs/InP avalanche photodiodes as sensors and coaxial cables as reflection lines to reject spike signals, we have firstly employed the ＂timing filtering＂ gates to pick out avalanche signals and have realized the single photon detection at 1550nm in the temperature range of thermoelectric cooling. A ratio of the dark count rate to the detection efficiency was obtained to be 9 × 10^-5 at 223K. When the detector is applied to a practical quantum key distribution system, the transmission distance can reach 89.5km and the repetition rate can reach 0.33 MHz.     

一维自旋系统(有限系统)

在[1],Spitzer提出了近邻质点系统(Nearest partiole systems),并找到了这类系统可逆的充要条件。在可逆情形,更新测度就是它唯一的可逆测度。此后,[2],[3],[4]等文献对近邻质点系统作了更细致的研究。特别是讨论了这类系统的临界现象,不变测度和死光向题。当然,近邻质点系统毕竟是很简单的一维自旋系统。为了进一步深入研究一维自旋系统,有必要将这个模型逐步推广。     

输出红光的电子俘获材料及其在图像存储和减法中的应用

研究了输出红光的电子俘材料的光学性质和物理机制。利用－２００μｍ厚的电子俘获薄膜在实验上证明了图像存储和图像减法的可能性。实验表明，这种材料对光存储和光学信息处理应用，具有很多有吸引力的优点，如：可擦除，可重写，高分辨，高速度，以及模拟和并行操作等。     

用于空间飞行器交会对接的CO_2相干激光雷达

本文综述了用于空间飞行器交会对接的ＣＯ＿２相干激光雷达系统的功能、设计及工作原理，并提出了用于我国空间飞行器自主交会对接的ＣＯ＿２相干激光雷达的技术方案。初步研究表明，所设计的ＣＯ＿２相干激光雷达用于空间飞行器交会对接中测量目标的距离及姿态是可行的。     

离散广义系统的求解和能控,能观性

本文讨论了离散广义线性系统解的结构,系统的各种能控性和各种能观性以及判别法。     

Simultaneous recording of fringe patterns with one camera

A novel method to separate and simultaneously record the Moiré interferometry fringe patterns of three deformation fields with only one CCD camera is developed; details of its operation principle, key points and error analysis are presented. With this technique, the deformation inU, V andW fields can be measured simultaneously, so dynamic test with comprehensive information can be performed. The advantage of this technique over other similar techniques lies in its simplicity, easy implementation and low cost. An application of this technique is given to show its feasibility. Technical problems that may be caused with this technique are also analyzed.