工程项目目标管理及其注意事项

介绍了工程项目目标管理的含义、内容和现状,阐述了目标管理的实现过程,提出了在工程项目中目标管理的注意事项.     

太阳能直接泵浦式激光器

太阳能是洁净的可再生能源,利用它来直接泵浦激光工作物质产生激光,即为太阳能直接泵浦式激光器.本文阐述了太阳能泵浦激光器的发展历程,介绍了太阳光的成像采集和非成像采集系统以及太阳能激光器的泵浦方式,并分析了掺Nd和CrNd共掺材料等激光工作物质的性能.最后经过分析,认为Cr/Yb共掺双包层光纤在太阳能泵浦激光器方面具有很大的应用潜力.     

下一代固体激光器：陶瓷激光器

在未来的许多应用中,陶瓷激光增益介质将代替单晶介质,这被认为是固体激光器的一次真正的革命.文中评述了陶瓷增益介质的发展及其优点,介绍了美国空军和陆军研究实验室对陶瓷介质特性进行的较为系统的研究.最后评论和分析了目前美国正在研制的两种具有高束质的大功率陶瓷激光器及其关键技术.     

Lasers in industry

Lasers can now be regarded as practical and economic tools with unique properties which have been utilized effectively in several applications in industry. Major applications of the laser are in thermal processes and measurements. Large amounts of concentrated energy allow microdrilling, welding, cutting, and fracturing to be simply effected in even the hardest materials. The coherence properties provide ideal sources for alignment instruments and interferometers for accurate length measurement. This paper describes these applications and their typical capabilities. Future developments and their potential are discussed, with the conclusion that the laser will be increasingly used in the manufacturing environment.     

半导体激光器面面观

量子阱(QW)激光器 (1)QW激光器 随着金属有机物化学汽相淀积(MOCVD)技术的逐渐成熟和完善,QW激光器很快从实验室研制进入商用化。QW器件是指采用QW材料作为有源区的光电子器件,材料生长一般     

半导体激光器

Surface-emitting semiconductor lasers can make use of external cavities and optical pumping techniques to achieve a combination of high continuous-wave output power and near-diffraction-limited beam quality that is not matched by any other type of semiconductor source. The ready access to the laser mode that the external cavity provides has been exploited for applications such as intra-cavity frequency doubling and passive mode-locking.     

军用多功能激光器

介绍了一种极具应用前景的新概念的军用多功能激光器及其发展状况。     

面发光激光器

面发光激光器，是新出现的高性能器件，它将在多媒体机、计算机、光通信中发挥重要作用，本文介绍它的特征、结构和新的功能。     

Multielectrode Semiconductor Lasers

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Multielectrode Semiconductor Lasers^①②

Multielectrode semiconductor lasers are studied via the ray method.The expression of the output photon number of N-electrode semiconductor lasers has been derived for the first time.When N=1 or 2,the expression of the output photon number fits in that of one-electrode(general)or two-electrode semiconductor lasers perfectly.     

窄线宽高效率的全光纤Yb^3＋激光器

利用光纤布拉格光栅（FBG）作为腔镜，研制了一种全光纤结构的掺Yb^2 光纤激光器。以泵浦波长978nm的LD作为抽运算，在1060.4nm波段获得了0.14nm的窄线宽激光输出。实验中发现掺Yb^3 光纤长度对激光器的阈值及输出功率均有影响，但光纤激光器的输出线宽保持不变。最大激光输出功率为2.36mW，斜率效率达到22.2%。     

电信企业如何实现目标管理

本文以目标管理的产生、发展和管理原则为出发点,结合当前电信企业经营管理和维护管理的实际情况,论述了如何在电信企业实现目标管理的方法,引导企业从事务管理向业务流程管理转变,通过改革现有的业务流程和组织结构达到提高管理效率的目标。     

固体薄片激光器和固体热容激光器

介绍了能够实现高平均功率的两种固体激光器：固体薄片激光器和固体热容激光器。给出了它们的工作原理和理论上的工作参数。综述了固体薄片激光器和固体热容激光器的研究历史和现状,指出了高平均功率固体激光器未来的发展方向。     

Mid-Infrared Raman Fiber Lasers

As mid-infrared (MIR) lasers show numerous applications in the field of defense, medical, materials processing, and optical communications. Investigation on MIR Raman fiber lasers (RFLs) increasingly becomes a hot topic. Compared with the traditional silica fibers, fluoride and chalcogenide glass fibers possess higher nonlinear coefficients and excellent MIR transmittances. In this article, the latest developments of the MIR RFLs using fluoride and chalcogenide glass fibers as gain media are introduced, respectively. This review article mainly focuses on the developments of MIR RFLs in aspects of output wavelength, output power, and optical efficiency. Besides, the prospect of MIR RFLs is also discussed.     

高功率固体激光器

本文详细讨论了设计高平均功率固体激光器的有关问题,包括激光材料性质、棒状和板条状几何结构,聚光器和光学谐振腔等。分析表明,板条状几何结构固体激光器提供了达到千瓦级功率水平同时又保持良好光束质量的可能性。     

准分子激光器及其应用

本文评述了准分子激光在激光加工、激光医疗中的应用前景,非线性光学在准分子激光技术中的运用,以及近年来高重复频率与高亮度准分子的激光器件的新进展。