激光器件的进展

本文根据１９９４年举行的第１０届国际激光与电光会议与国际量子电子学会议上有关激光器发展的报告综合而成。     

激光设备及器件

密封式射频CO2激光器,半导体泵浦固体激光器模块,高速光学扫描振镜,[编者按]     

我国激光加工技术的发展近况

本文叙述了我国激光加工现状及其技术特点，激光加工的应用以及天在开发研究的项目。     

有机电致发光器件发展近况

简述目前正在研制开发中的有机薄膜电致发光器件，着重介绍器件所用的分子材料，包括大分子和小分子材料以及器件的单层和多层结构形式，在光发射稳定性进一步改进之后，该类型器件将有希望应用在大面积发光显示方向。     

激光晶体的新发展

本文根据最新资料对固体激光器所用激光晶体的近期发展作了详尽综述，并对我国应如何发展激光晶体研究提出建议。     

The present state of the art in high-power semiconductor devices

Since the mid-1990s, thyristors and GTO capacities have been increased, resulting from the use of 6-in floating zone (FZ) Si wafers (which were developed in 1993) and the integration of new technologies for wafer processing and design (also developed in the 1990s). As devices have become more capable, the next step in moving forward is to take these self-turnoff devices and bring higher performance to power electronics, thereby widening the application field     

Millimeter-wave generation with plasma devices: The state of the art

The electron beam-plasma interaction and the plasma multiplier have been investigated during the last decade in the hope that one or the other might have some application at millimeter wavelengths. So far the expectations for these devices have not been realized because of many unresolved engineering problems. Major difficulties are described here, and an attempt is made to evaluate the potential of both devices.     

我国激光晶体的研究进展

对我国激光晶体的研究进展做了概括的回顾和展望。为开创激光晶体发展的新局面,提出几点建议。     

光电设备激光防护技术研究进展

为削弱激光对光电设备的损伤,提高复杂战场环境下光电系统的生存能力,光电设备需要采取必要的防护措施。总结了目前基于线性、非线性和相变的激光防护技术和材料,包括薄膜结构、光子晶体结构、聚合物结构、微镜结构等,分别说明了各种结构的防护机制、性能参数、适应性等指标以及未来的研究方向,最后指出激光防护技术的发展趋势。     

免调试固体激光器研究与进展

介绍了免调试固体激光器的概念、几种主要结构形式和基本特性,总结了国内外的研究动向,介绍了几种实用固体激光器及其应用,最后预测了其发展趋势.     

The state of the art in interplanetary Internet

Developments in space technologies are enabling the realization of deep space scientific missions such as Mars exploration. Interplanetary (IPN) Internet is expected to be the next step in the design and development of deep space networks as the Internet in the space. However, there are significant challenges to be addressed for the realization of this objective. This article captures the current state of the art and open research challenges, and intends to motivate researchers around the world to tackle these challenging problems and help realize the IPN Internet.     

The state of Japan's military art

The issues surrounding an arrangement that allows Japanese codevelopment and coproduction of an advanced version of the F-16 fighter jet, known as the FSX project, are examined. US opposition to the FSX project arises from fears that the project will help Japanese companies compete effectively against the United States' civil aircraft industry. Another charge is that Japanese companies may be eyeing the export market in military weapons. The nature of the Japanese defense industry is discussed, and the state of its technology is assessed. The likely impact of the FSX project on the US is considered     

Pension plans: The state of the art

The effect of termination of employment on pension benefits has become a matter of grave concern to engineers and scientists in the United States, particularly to those in the professions served by IEEE. In many cases during the postwar years, the decision to transfer from one employer to another has been a voluntary act of the professional worker and he could measure the cost of losing future pension benefits against the advantages of taking a new job. But within the last two years, a major change has occurred in the space and defense industries and their suppliers, which are so largely dependent upon government support of scientific and engineering work. In addition to discussing current pension practices in the United States, this report includes a review of activities by societies in this field, and the limitations imposed by legal and economic forces.     

Gas-discharge displays: The state of the art

The physics of the cold-cathode gas discharge is reviewed, with emphasis on such display-related aspects as the visible light output and the use of priming as a method of moving the light-emitting site through the display. Displays used for numerics, alphanumeric characters, and computer graphics are described, with attention being given both to commercially available units and to those which are still in the laboratory. Attempts to produce gas-discharge TV displays are reviewed. Such related problems as drive circuitry and overall system cost are discussed, with emphasis on considering the entire display system, including all the required power supplies and drive-circuit components.     

The current state of the reflector antenna art

The current state of the reflector antenna art is presented in the form of a review article, intended primarily for engineers who are new in the field. The properties of paraboloidal antennas are related to aperture efficiency, surface tolerance, feed defocusing, and aperture blocking. Other reflector shapes considered are offset-fed paraboloids, classical and offset Cassegrain systems, shaped-dual reflectors, and scanning reflectors. Properties of contoured-beam systems are reviewed. Structures and materials are reviewed for ground stations and satellite-borne reflectors. Emphasis is placed on specific hardware examples for each principle or concept. Near-field probing, dichroic surfaces, and techniques of surface metrology are presented as examples of promising areas for new developments.