【摘 要】
：
The electric field distribution in LiNbO3 cryst
【机 构】
：
KeyLaboratoryofSpaceLaserCommunicationandDetectionTechnology,ShanghaiInstituteofOpticsandFineMechani
【出 处】
：
ChineseOpticsLetters
论文部分内容阅读
The electric field distribution in LiNbO3 crystal under different electrode shape is presented by using the digital holographic interferometry. Three configurations of phase modulator including the rectangular electrode type, single-triangle electrode type, and dual-triangle electrode type are performed in this experiment. The nonuniform electric field distribution in these phase modulators are observed and the electric field increases with voltage increasing. The digital holographic interferometry with high electro-optic effect improves the measurement precision. The digital holographic interferometry provides an effective way for studying the electric field distribution. Such in situ quantitative analysis of electric field distribution is a key to optimizing electrode shape.
其他文献
基于时域有限差分法(FDTD)对一维金属线栅结构在0.2~2.6 THz波段的偏振特性进行了数值分析，研究了其结构参数如金属占空比、狭缝宽度以及线栅周期对相互垂直的两种偏振模式太赫兹波透射系数的影响。利用光刻和金属膜制备工艺，在1 mm厚的高阻硅衬底上淀积了200 nm厚的金膜，制成了一系列一维金属线栅结构。利用太赫兹时域光谱系统，实验测量了这些线栅结构的太赫兹透射特性，实验结果与模拟结果规律一致。结果表明：适当设计金属线栅周期，同时满足一定的金属占空比要求，其整体偏振和透射性能能够得到优化。金属线栅结构
CO2气体放电激光器在10.6微米波长处能产生千瓦连续波激光输出，用旋转反射镜对激光腔进行Q调制后，甚至能产生更高的功率。旋转反射镜Q开关CO2激光器的实验研究表明，脉冲的结构包括二个强尖峰，脉冲持续期随气体压力的增大而减短。这种性质是碰撞引起的迟豫过程的反映。这过程相当迅速，在旋转反射镜的准直期间，它就能改变激光的反转状态。由于脉冲持续期与压力有关，在致热碰撞不致耗尽反转的最高压力（约20托）下可获得最大的Q开关功率。为了获得大于105瓦的峰值功率，要求长的激光放电，但困难在于在很
A novel chromatic dispersion (CD) monitoring technique based on asynchronous amplitude sampling (AAS) is proposed for a higher modulation format and higher rate system. The dispersion and other impairment factors can be separated with the definition of mo
Plasmonic devices using periodic metallic nanostructures have recently gained tremendous interest for color filters, sensing, surface enhanced spectroscopy, and enhanced photoluminescence, etc. However, the performance of such plasmonic devices is severel
Visible light communication between light emitting diode (LED) traffic lights and vehicles with a receiving photodiode front-end is developed for intelligent transportation systems. In this letter, the communication data rates for different ranges are eva
设计了一种基于荧光成像的X射线光束在线监测装置,用于上海光源硬X射线光束的实时在线监测。相较于现有位置监测器和气体电离室,该装置能实现2 kHz高速采集,具有实时监测光束位置、通量、尺寸以及重建入射光波前相对变化量的功能,且不会影响下游实验开展。该装置可用于光学器件和实验位置反馈,在超长和微纳聚焦光束线站将有很好的应用。在上海光源时间分辨超小角散射线站的USAXS和微聚焦SAXS实验站利用该装置开展在线监测实验,采集并分析了常用实验帧率下的光束稳定性数据,得到了该线站光束位置、通量、尺寸分布的时频域信号和
以二氧化硫的氧化反应为基础建立的超声化学CO激光器遇到了一些困难，主要是为获得激活粒子而需要实现快速化学反应。文献[1,2]中利用等离子体管对氧或空气进行离解就获得原子氧，但是效率是很低的。文献[3]报导了在NF3 CH4 H2混合物的高温火焰中进行CS2离解，这是在包含氧和含氧分子、去激活振动-激发CO分子的混合物中的反应，并使激光工作效率下降。本文首次报导基于燃烧CS2-O2混合物获得原子氧的超声CO激光器研究结果。
In the far field of the intensity distribution of the beam delivered by a two-stage transient–collisional excitation X-ray laser (XRL), a non-expected interference pattern that is stable from shot to shot has been discovered. It is demonstrated that the i