机载定向能武器反导概念研究

首先介绍了定向能武器的分类和国外主要机载激光武器项目的发展状况,然后分析了激光武器的特点、组成,列举了机载激光武器应用的关键技术和主要性能指标。最后,基于以上研究,提出了机载激光武器反导火控系统的需求分析,为机载定向能武器反导的火控系统设计提供了基础。     

美国高能激光武器的发展及其面临的挑战(下篇)

首先介绍了美国高能激光武器的发展战略和高层技术路线(上篇)。然后分别评述了近一年来机载战区激光武器,战术高能激光武器和机载战术激光武器,天基激光武器,地基激光反卫星武器和舰载激光武器取得的重大进展,分析和讨论了它们面临的技术挑战和可能采取的对策(下篇)。     

美国高能激光武器的发展战略(上篇)

首先介绍了美国高能激光武器的发展战略和高层技术路线(上篇)。然后分别评述了近一年来机载战区激光武器、战术高能激光武器和机载战术激光武器、天基激光武器、地基激光反卫星武器和舰载激光武器取得的重大进展,分析和讨论了它们面临的技术挑战和可能采取的对策(下篇)。     

美国激光武器发展分析

介绍了激光武器的主要特点,从激光器基础技术、车载高能固体激光武器技术、舰载激光武器技术、机载激光器技术等方面分析了美国激光武器的发展历程以及装备的研制、改进情况,探讨了美国在天基、机载、车载、地基、舰载等平台的激光武器研制计划及在一些关键技术方面取得的突破,基于上述分析总结归纳了美国激光武器的发展趋势。     

以色列机载激光武器发展及试飞特点研究

机载激光武器作为颠覆性作战力量是各国竞争焦点,相比美国、前苏联采用大型运输机对其进行演示验证试飞,以色列2021年采用塞斯纳208B小型民用飞机进行演示验证试飞,特点鲜明。为推动机载激光武器试验技术的发展,对以色列机载激光武器发展诱因、研究现状和规划、飞行试验特点和启示进行深入的研究,结果表明以色列国土防御面临的火箭弹饱和攻击、集群无人机攻击压力是其激光武器发展的实际需求,本次飞行试验是其30余年激光武器系统持续研究的成果,采用了光纤激光器,武器系统重量约1.5 t,全部由储能电池供电,主要解决了大系统闭环验证问题,但缺少对激光能量的定量测量与分析,预计后续会有持续性飞行试验,同时研究给出了应适时、选择合适试验机、循序渐进开展机载激光武器飞行试验的建议。     

军事光电动态

机载反导激光武器研究美国开展机载反导弹激光武器的研究。美国军方人员和政府科学家说,美国政府正在开展两项机载激光武器的研究,这种武器可从远距离击中“飞毛腿”这类战术弹道导弹。     

“机载激光试验台”现状及实战应用困境浅析

从"机载激光试验台"发展历程和最近美、德学者对"机载激光试验台"实战效应的评估结果上看,机载激光武器在反导、反卫上具有良好的应用前景,但真正投入实战尚需时日。基于对最新动向和实验结果的认识,指出了当前影响机载激光武器远程打击能力的主要因素。     

机载激光武器回顾与发展

鉴于美国对弹道导弹"多层防御"体系建设的日益重视,从发展历程、发展现状和未来规划三部分,详细介绍了作为弹道导弹"多层防御"体系重要组成部分的机载激光武器的研制进展情况,以期为读者提供机载激光武器过去、现在、将涞三方面全方位的发展信息,同时还分析了机载激光武器在研制过程中所遇到的包括技术实现和经费等在内的一些困难,希望对我国该领域的发展起到一定的参考作用.     

机载激光武器仿真系统与分析

在分析机载激光武器(ABL)战技术指标和作战过程的基础上,建立了机载激光武器仿真系统,该系统由弹道导弹、载机、测距激光、跟瞄系统、激光大气传输和高能激光毁伤评估模块组成。重点研究了机载激光武器的建模,包括测距激光探测概率计算、复合轴跟瞄系统设计、大气对激光造成的衰减和扩散以及高能激光毁伤计算等。最后,搭建了仿真系统进行反导拦截试验,从攻防两方面对影响机载激光武器毁伤效果的主要因素进行了分析,并给出了仿真结果。该仿真系统可以为机载激光武器反导效能的分析评估提供平台和依据。     

机载激光武器技术发展探讨

美国的ABL系统是一个集成了大气补偿技术的兆瓦级机载激光武器系统,ABL的设计目标是击毁敌方的弹道导弹。本文对ABL的作战使用方法、系统组成以及主要关键技术进行了介绍,分析了其发展过程中遇到的技术困难,探讨了我国机载激光武器的发展思路。     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Development of the readout system for waveguide multilayer optical card

Waveguide multilayer optical card （WMOC） is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling ＆ processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic （VB） language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Collinear phase-matching study of terahertz-wave generation via difference frequency mixed in GaAs and Inp

The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well.     

Effects of the alloy compositions on the phonon-polaritons in ternary mixed crystals

Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.     

New insert layer structure OLEDs

An insert layer structure organic electroluminescent device（OLED） based on a new luminescent material （Zn（salen）） is fabricated. The configuration of the device is ITO/CuPc/NPD/Zn（salen）/Liq/LiF/A1/CuPc/NPD/Zn（salen）/Liq/LiF/A1. Effective insert electrode layers comprising LiF（1nm）/Al（5 nm） are used as a single semitransparent mirror, and bilayer cathode LiF（1 nm）/A1（100 nm） is used as a reflecting mirror. The two mirrors form a Fabry-Perot microcavity and two emissive units. The maximum brightness and luminous efficiency reach 674 cd/m^2 and 2.652 cd/A, respectively, which are 2.1 and 3.7 times higher than the conventional device, respectively. The superior brightness and luminous efficiency over conventional single-unit devices are attributed to microcavity effect.