激光智能制造技术可大幅度提升工业生产效率,能够助力更好地实施大健康、防御严重天灾,打造更安稳、幸福的人居环境. 激光智能制造是激光制造技术与人工智能技术相结合的新型制造技术.

Global climate anomaly is a global concern, and it is related to the survival and development of human beings. The factors leading to the global climate anomaly are highlighted.

医学是人类健康的保护神.精准医学的提出和发展,大大提高了疾病预防、诊断和治疗的效果,进一步为人类消除病痛、健康生活带来更有力、更好的保证. 医学新理念 精准医学是一种生物医学医疗保健战略,对患者进行个性化诊断、医疗决策、药物治疗及预后,从而改善生活质量.精准医学,又称为"个性化医疗",是一种医疗模式.是以个人基因组信息为基础,结合蛋白质组、代谢组等相关内环境信息,为患者量身设计出最佳治疗方案,以达到治疗效果最大化和副作用最小化的一种定制医疗模式.该模式从对"症"下药改变为对"人"下药,贯穿于疾病预防、分析、诊断、治疗的各个阶段.

光谱技术是分析人体组织和体液的成分、生物分子结构等发生变化最灵敏的技术之一,利用它能够快捷、灵敏地诊断疾病、检测病毒、鉴定药物性能. 诊断和治疗是临床医学的两个基本任务,诊断的主要任务是查明疾病的病理变化、了解病理状态下的机能变化、找出致病因素,这对医生设计治疗方案、评价治疗效果有重要价值.显然,治疗疾病的成功率与诊断准确性密切相关. 利用光谱技术能够了解物质结构、物质成分以及它们的含量,且分析灵敏度和精度都很高.所以,这门技术在生产实践和科学研究中得到广泛应用.近年来发展的与计算机技术相结合的光谱技术,具有自动、快速获取诊断生物组织信息的功能,如类似于B超的激光干涉断层成像术,其性能比传统的B超强得多,其空间分辨率更高,可小于10微米,而且有很高的信号灵敏度,可探测到信号光强度为入射光强度1/1010的光信号.

激光器是20世纪的伟大发明,它为人类带来了亮度极高、相干性极好的新型光源.利用激光开创了一系列新科技领域、创立了极端物理实验条件、革新了工业和医疗技术.

2018年12月6日,我国在重庆璧山区启动建设首个空间太阳能发电站实验基地,在36 000千米外的太空建兆瓦级太阳能发电站,为空间太阳能电站最终进入商业化迈出了重大一步. 太阳能是清洁能源,而且存储量巨大,可以说是用之不竭的能源.21世纪以来,随着世界能源价格的不断攀升和环境的日益恶化,越来越多的国家、组织、企业和个人,包括军方都开始关注太阳能.

激光是20世纪与原子能、计算机、半导体齐名的四项重大发明之一。我国在1961年9月研制成功激光器，迄今已经50年。50年来，我国科学技术人员凭着自己的勤劳和智慧，为激光技术的发展做出了重大贡献，使我国激光技术站在了世界先进行列。

1960年激光器发明,人类看到了地球上本来没有的光性质:相干性.因其特殊聚集性和传播特性,实现了之前非相干光无法完成的许多任务,并在工农业生产、国防建设以及科学研究中获得了广泛应用,催生了一系列的新科学和新技术.

1 引言 1954年微波激射器问世,距今已有55年,这是20世纪的重大发明之一.然而,科学家对太空的探测结果表明,微波激射在宇宙空间已经存在了几十亿年.

从1961年中国宣布第一台激光器研制成功至今,激光技术已在我国的众多领域广泛应用,为科技进步、国民经济发展和国防建设作出了积极贡献,在国际上也争得了一席之地.1978年我国制订的改革开放政策,给国民经济和科学技术的发展注人了强劲动力.30年来,我国在激光技术领域更是取得了一系列举世瞩目的成就.

With the aid of the detection on the multimedia messaging service (MMS) of the laser accidents, novel insecurity factors in laser safety informatics are investigated. By using continuously improved laser self-organization safety system, new concepts of laser safety are developed. Various kinds of accidents can be avoided when comprehensive protective measures are taken.

1954年微波激射器问世,距今已经55年了,这是20世纪的重大发明之一.

<正>邓锡铭院士离开我们10年了,但是,他对激光科学技术发展所作出的贡献,却是挥之不去,永远留在我们的心中。邓院士是我国激光科学技术的奠基人之一,也是《激光与光电子学进展》(它的前身是《国外激光》)的创始人。

The type-II phase-matched second harmonic generation (SHG) in a KDP crystal has been studied experimentally. A passively mode-locked Nd:phosphate glass is used as a pump source. At a pump pulse peak intensity of I0=4GW/cm2, SHG conversion efficiency are 79.54% and 64.06% respectively while the input polarization is at 45�� and 35.3�� with respect to 0 direction of crystal. The waveform of SHG is measured with Textronix SCD1000 transient digitizer oscilloscope and the spectrum of it is analyzed by 2048 one-dimensional CCD. The bandwidth is 0.0023nm. When LN crystal is used instead of KDP in the experiment, the phenomenon of smoke-like mark is also discovered in LN crystal when it is nearly damaged by more intensive laser.

A multi-functions spectral setup at VUV/XUV and a high power laser system have been built during the last few years. The laser system contains a two Nd3+:P-glass rods oscillator and one multi-passes amplifier, which outputs a fundamental frequency laser beam at wavelength 1.053 ��m of above 10 GW. The interaction between the focusing laser and a Ne atomic beam with a nozzle pressure of 1300 Pa has produced a series order of harmonic laser. The shortest harmonics wavelength identified is 50.1 nm or 21st order harmonic. Optimization of the experimental parameters, and the relationship between the nonlinear polarization of the atoms in the gas beam under the strong optical field and the photo-ionization were also discussed. An idea of using a seeded XUV coherent light source with a well controlled character and a strong intensity was also mentioned.

The radiations fields of FELs are analysed by using the classical electrodynamics. The general characteristics of radiation fields are discussed, and the mathods of self-consistent solutions for the radiation fields of FELs are establised systematically by using the Maxwell equations, wave equation, continuity equation of electron, Lorentz force equation and energy equation of relativistic electrons.

The object of this experiment is to obtain a laser source with good beam quality, tunable width of pulse and over GW power for further study of High-order harmonics experiment. Two rods of Nd3+:p-glass with Brewster angle ends setting in one laser cavity and color center crystal, LIF:F2 -: or dye (Dye No.5 and Dye HR1301) are used as a passive Q-switch. A divergence angle of Q-switching laser is less than 0.62 mrad, and the tunable range of pulse width is 10-250ns. A few mode-locking spikes are contained in the Q-switching envelope. The depth of the mode-locking is nearly 100%.