论文部分内容阅读
俄罗斯激光领域的新成果
【出 处】
：
激光与光电子学进展
【发表日期】
：
1997年34期
其他文献
Properties of single and multiple defect modes in one-dimensional photonic crystals containing left-
Wave propagation is studied in structures consisting of alternate left- and right-handed layers. Bragg gap and zero-n gap appear in different frequency regions of the structure. The periodicity of the structure is broken by simply reversing the order of t
激光等离子体磁重联实验再现了卫星观测到的日地磁场活动特征。一方面,实验再现了太阳冕区物质抛射及耀斑结构，包括明亮的尖屋顶状环、具有微细结构的磁化等离子体团以及二者之间因为磁场拉扯而产生的二阶电流片。另一方面，实验发现存在三个电子扩散区(EDR)，这与欧洲空间局Cluster卫星先后在2003年和2005年发现的分别处于地磁尾重联区中间部位及两侧分形线位置的两类EDR结构相似。所不同的是，在激光等离子体磁重联实验中，两类EDR在一次重联过程中产生，但中心EDR出现时间晚于两侧EDR，且其发展速度更快，喷流速
A computer generated holographic stereogram based on the wavefront recording plane (WRP) is presented. A WRP closed to the parallax image plane is introduced to record the complex amplitude in a small region for each point in the parallax image. By using
利用均匀线聚焦激光产生的等离子体和软X针孔透射光栅谱仪获得了均匀的线状软X光单色光源.在这一光源基础上,利用加阶梯膜的新方法首次标定了国产无保护层5F软X光胶片在软X光波段的响应特性.
提出了用反向调制照明法分析光栅成像效应的观点，研究了光栅系统的反向衍射干涉效应，成功地揭示了泰伯(Talbot)效应与劳(Lau)效应的内在联系，并在白光双光栅衍射干涉的“消色效应’的基础上获得了白光扩展光源照明下的白光光栅成像效应和具有实用意义的四光栅干涉系统。
为保证图像还原质量的情况下实现数字相机实时处理的功能,提出了一种基于梯度的单通道独立插值算法。通过引入绿色分量的水平、垂直梯度及梯度差值的阈值不仅可以使图像的边界信息得到更好的保存,也可以使平滑区域的色彩更加平滑。同时引入红色、蓝色分量的斜45°、斜135°方向的梯度作为边界判定的补充,保证三种颜色通道的边界都能得到有效判断,使整个图像边界变得更清晰。为验证算法的插值效果,采用Matlab进行仿真
In this paper we report TE-mode phase modulation obtained by inducing a capacitive charge on graphene layers embedded in the core of a waveguide. There is a biasing regime in which graphene absorption is negligible but large index variations can be achiev
Calibration and verification of streaked optical pyrometer system used for laser-induced shock exper
Although the streaked optical pyrometer (SOP) system has been widely adopted in shock temperature measurements, its reliability has always been of concern. Here, two calibrated Planckian radiators with different color temperatures were used to calibrate a