共查询到17条相似文献,搜索用时 187 毫秒
1.
2.
新型KTP电光偏转器的设计和分析 总被引:3,自引:0,他引:3
设计了新KTP电光偏转器,当通光口径D=4mm,长度L=40mm时,其时间分辨率为180ps,从而可获得最窄宽度为400ps的整形激光脉冲,而相同结构的LiNbO3电光偏转器最窄只可获得宽度为830ps的整形激光脉冲,分析了电光偏转器设计中影响其性能指标的因素,指出利用恒温炉装置可消除激光脉冲在传播过程中的波面畸变。 相似文献
3.
4.
一种8行任意扫描的电光扫瞄器 总被引:2,自引:0,他引:2
针对激光的快速智能扫描,综合利用晶体的双折射效应和电光效应,提出一种电控集成8行任意扫瞄的高速光扫描方案。主要由三级数字电光偏转器和8×1的周期性极化电光棱镜组构成,其中3个电光快门和3块双折射晶体构成三级数字偏转器,通过半波电压的控制实现行位置的转换,一定数目的周期性极化电光棱镜级联组成单行偏转器,通过控制电压进行单行扫描,根据电场施加方式可实现数字型或者连续型扫描。利用梯形结构的电光棱镜组设计了最大电压为5.822 kV时,扫描视场为17.256°的可通过联机控制进行任意行扫描的高速激光扫描器。 相似文献
5.
畴反转结构片状集成4×4电光开关的设计与仿真 总被引:1,自引:1,他引:0
基于铁电体畴反转结构的电光偏转特性,设计了一种片状集成的4×4电光开关,其由四个结构相同的半抛物和四个抛物形微小偏转器集成构成.通过优化抛物形偏转器结构,给出了电光开关的设计参量,电光开关性能通过光束传播法进行仿真模拟,仿真结果表明该开关切实可行.实际应用中,系统误差可以通过电场调节补偿,使光路准确交换.该片状电光开关的整体尺寸为48 mm×2.2mm×0.5 mm(长×宽×高),最大使用电场约13.73 V/μm,适用于高速交换的光互连系统. 相似文献
6.
7.
8.
本文仅对激光扫描形式的大屏幕显示作一概括报导,包括从1964年到1973年间的单色、彩色和立体的激光显示的主要进展情况,对其中机械扫描、电光扫描和声光扫描的激光显示实例给以简单介绍,并讨论了显示器的三个组成部分:光源、偏转器和屏结构。 相似文献
9.
10.
在高速摄影中,作为传递信息的光子(或者电子)必须随着时间变换其空间位置(相对记录介质而言)。如果仅仅讨论记录介质静止的情况,那就必须对光速进行偏转。偏转的方法有转镜偏转,声光偏转和电光偏转等。 相似文献
11.
根据SFC引出静电偏转板的特殊工作环境和运行中发生的现象, 对其高压放电机理进行了深入的研究和大量的电磁场计算。 计算结果表明, 在电场和磁场的共同作用下, 盖板损伤的发生部位与实际运行中的打火痕迹完全符合。 最后阐述了SFC引出偏转板的高压放电过程, 并对其改进措施进行了研究。Due to the special working conditions of the SFC extraction deflector, the breakdown of the deflector is a serious problem. Based on the electromagnetic field calculations and the analysis of electrons and ions in the field, the breakdown mechanism was investigated. The calculated results about the electron hitting spots on the liners are consistent with the observed ones in the operation. At last, an improvement method of the deflector is suggested by using aluminum cathode and combined liners 相似文献
12.
G.A. Alphonse 《Ultrasonics》1975,13(5):201-202
A practical inexpensive mechanism for effecting improved Rayleigh resolution in a random access deflector without sacrificing its performance has been constructed. It comprises an acousto-optic deflector in the form of a flat transducer grating, made from a single piezoelectric platelet. The deflector steers the acoustic column to track the Bragg angle as the acoustic frequency changes. 相似文献
13.
S. N. Antonov 《Acoustical Physics》2018,64(4):432-436
A new acousto-optic deflector with a wide angular scanning range and a high diffraction efficiency has been studied. The device uses an additional deflector, which allows the angle of incidence of the input beam to be adjusted in order to fulfill the Bragg phase–matching condition over the entire scanning range of the main deflector. The characteristics of an anisotropic two-crystal deflector based on paratellurite crystals have been measured. It has been established experimentally that the operating bandwidth of the device is 32 MHz for a diffraction coefficient no less than 90%, which determines a light beam scanning angle of 50 mrad. 相似文献
14.
基于计算流体力学(CFD)理论,研究了不同曲率半径的螺旋导流片的托卡马克真空室内线圈水冷管道接头。利用湍流数值模拟方法,分析了线圈管道接头导流片曲率半径比、冷却水入口流速对线圈管道内流体平均雷诺数分布的影响。结果表明,不同导流片曲率半径比的线圈管道内的流体雷诺数分布曲线相似,平均雷诺数随入口流速的增加而增大,管道接头出口雷诺数随导流片曲率半径比的增大而减小,导流片曲率半径比小的管接头更适用于线圈水冷曲线管的二次流强化。此外,还为导流片曲率半径比为0.2的管接头拟合了管接头出口雷诺数与入口流速的关系式,为进一步研究类似于托卡马克真空室内线圈管道的曲线管接头的二次流强化提供理论基础。 相似文献
15.
ZHANG Jing-Ru DAI Jian-Ping GU Qiang PEI Guo-Xi ZHAO Ming-Hua ZHONG Shao-Peng WANG Xing-Tao CHEN Yong-Zhong HOU Mi 《中国物理C(英文版)》2010,34(1):138-142
RF deflectors can be used for bunch length measurement with high resolution. This paper describes a completed S-band traveling wave RF deflector and the bunch length measurement of the electron beam produced by the photocathode RF gun of the Shanghai DUV-FEL facility. This is the first time that such a transverse RF deflector has been developed and used to measure the bunch length of picosecond order in China. The deflector's VSWR is 1.06, the whole attenuation 0.5 dB, and the bandwidth 4.77 MHz for VSWR less than 1.1. With a laser pulse width of 8.5 ps, beam energy of 4.2 MeV, and bunch charge of 0.64 nC, the bunch lengths for different RF input power into the deflector were measured, and an averaged rms bunch length of 5.25 ps was obtained. A YAG crystal is used as a screen downstream of the deflector, with the calibrated value of 1 pix = 136 μm. 相似文献
16.
ZHANG Huan-Qiao LIN Cheng-Jian YANG Feng JIA Hui-Ming ZHOU Ping AN Guang-Peng ZHANG Chun-Lei XU Xin-Xing 《中国物理C(英文版)》2010,34(10)
An electrostatic deflector for separating the fusion evaporation residues from the beam-like products in heavy ion reactions was installed.The evaporation residue separation and identification with the electrostatic deflector setup was tested with the reaction 32S+96Zr at several energies.The fusion evaporation residues and the beam-like particles were well separated after the electrical separation and the experimental fusion cross section obtained from the angular distribution is in good agreement with the calculated value well above the Coulomb barrier.This confirms the reliability of the setup. 相似文献
17.
A novel beam-steering external cavity diode laser using an intracavity lead lanthanum zirconate titanate(PLZT) electro-optic ceramic deflector is proposed and demonstrated experimentally.The laser consists of a semiconductor laser with single mode fiber coupled output,polarization controller,PLZT electro-optic ceramic deflector,and output concave mirror.By applying proper driven electrical signals on the PLZT electro-optic deflector,the beam deflection angle achieves 5.8 mrad at 1 000 V.A high-speed beam-steering property with less than 120-ns switching time is also observed.Moreover,a good beam quality with Gaussian spatial profile and a linear polarization state are obtained. 相似文献