我国激光器件的发展概况及近况

综述了我国大功率激光器、晶体激光器、半导体激光器、气体激光器、化学激光器和染料激光器的发展概况及近况，并对进一步发展我国激光器件的问题进行了讨论。     

波导激光器的研究进展与展望

首先综述了气体波导激光器、空芯光纤气体激光器和固态波导激光器的发展史,然后分别介绍两类激光器的工作原理,最后根据两类激光器的发展现状对未来的研究进行了展望和分析。     

光纤气体激光光源研究进展及展望(Ⅱ):基于粒子数反转

粒子数反转和受激拉曼散射是实现光纤气体激光器输出的最常见的两种基本原理。与光纤气体拉曼激光光源不同,基于粒子数反转原理的光纤气体激光器是通过气体分子振转能级的本征吸收跃迁实现激光输出。由于绝大多数气体分子的振转能级对应的激射跃迁谱线都在中红外波段,这种激光器的输出波长基本都在中红外波段。简要分析了基于粒子数反转原理的光纤气体激光器在产生中红外波段激光方面的优势,重点回顾了其发展历史与研究现状,并对下一步的发展趋势进行了展望。     

全固体激光器向离子激光器挑战

高功率连续波可见和紫外激光器的年销售市场约为7500万美元。其应用包括娱乐、科研激光器泵浦、医学、复印、立体光刻和光盘母盘刻录等方面。这种市场的规模和多样性吸收了众多激光器制造商提供各式各样的产品。直至最近，高功率连续波可见光和紫外激光器都还是“气体和离子激光器”的同义词。遗憾的是，目前水平的几瓦离子激光器其总体效率低于0．05％，这意味着“气体和离子激光器”具有很高电力和水力费用，以及高功率气体激光器所特有的大尺寸和大重量。虽然在绝对需要高功率（大于1W）、短波长（＜675mm）、高光束质量激光的应用中允…     

气体激光器的发展近况

气体激光器的发展近况粗略地看，由于近年来固体和半导体激光推向应用，气体激光器的应用正在逐年减少。世界的激光市场数据有时也支持上述看法，例如：可调谐固体激光器每年增长１３％，由于其可靠性好，在科研激光器市场中已遂步替代传统的气体激光器。但是这种泛泛而淡...     

光泵浦远红外气体激光器的研究发展

远红外激光具有穿透性强、光子能量低、带宽宽、通信传输容量大等优点,在公共安全、环境探测、生物医学、天文观测、军事以及通信等方面得到了广泛应用。在介绍了远红外波段激光器发展的基础之上,对产生远红外激光的各种方式进行了对比分析和总结,讨论了光泵浦远红外气体激光器的技术优势,并针对近年来远红外激光工作介质及其新谱线进行了归纳。通过对连续和脉冲光泵浦远红外气体激光器发展的回顾,结合该领域的一些重点研究方向,给出了未来光泵浦远红外气体激光器的研究趋势。     

激光快速成型系统新型能量源的研究

快速成型机的小型化、低成本化是当今快速成型机技术的主要发展方向。现有激光快速成型系统使用的激光光源大都是气体激光器。针对现有激光快速成形系统使用气体激光器存在的缺点,研究使用半导体激光器或光纤激光器的新型能量源来代替气体激光器。提出了使用高功率半导体激光器线阵和高功率光纤激光器线阵两种方案,并比较了利用此两种方案作为激光快速成型系统能量源的优缺点。     

高效放电KrCl激光器

目前在一系列应用中 (医学、光刻术等 ) ,用得很多的是短波长 Kr F*放电激光器 (波长 2 48nm) [1 ] 和 Ar F* 放电激光器 (波长 193nm) [2 ]。在这些激光器的气体混合物中 ,有有毒的化学活性氟。为使 Kr F*和 Ar F*气体混合物能长时间工作 ,必须使用复杂和昂贵的气体混合物再生系统。可用辐射波长为 2 2 2 nm的 Kr Cl*激光器来替代上述激光器 ,它使用了无毒氯化氢 [3 ,4]。给 Kr Cl激光器的混合气体添加氢可大大提高使用寿命 [5 ]。但到目前为止 ,已知的Kr Cl激光器性能参数仍然是低的。研究表明 ,为使 Kr Cl激光器有效地工作 ,抽运…     

He—Ne激光器规模生产与发展前景

本文叙述了He-Ne激光器商品化现状及世界市场。向OEM用户出售低功率红光He-Ne激光器的公司,运用规模经济来降低成本取得了成功,以Uniphase公司为例介绍规模生产的现状。我们认为,我国对He-Ne激光器的需求及市场不同于西方,应着重发展He-Ne激光器的应用及其批量生产。     

国外可见光半导体激光器概况

一、可见光半导体激光器的提出 随着对半导体激光器应用研究的不断深入,要求其波长向长波和短波两方扩展,于是人们着手研究光通信光源用的InGaAsP系长波长半导体激光器和光信息处理光源用的可见光半导体激光器。在可见光半导体激光器问世以前,光信息处理,光印刷,视频唱片等的光源均采用波长为632.8nm的He—Ne气体激光器。随着红外光半导体激光器的发展,逐渐提出了用可见光半导体激光器取代可见光He-Ne气体激光器的要求,因为前者比后者具有无可比拟的优点,例如体积小,工作电压低,适于高速率调制工作,有利于集成     

高能半导体泵浦气体激光器

在重新梳理高能激光底层物理问题的基础上,指出半导体泵浦气体激光器将是未来高能激光器的重要发展方向,讨论了半导体泵浦气体激光器的基本原理和核心要求,并以半导体泵浦碱金属蒸气激光器为例进行了详细剖析,对半导体泵浦气体激光器的前景进行了展望。     

气体激光器的微波激励技术

作为一种优良的气体激光器的激励技术——微波激励技术,已成功地用于多种辉光放电形式的脉冲和连续波气体激光器中,其中包括原子、分子和准分子激光器,并已进入实用化阶段。本文评述这种激励技术的进展。     

Direct modulation of gas lasers

Direct modulation of gas lasers such as internal modulation, coupling modulation, and phase locking, has been investigated in a 6328 Å He-Ne laser containing a composite modulation element with small insertion loss. It was verified theoretically and experimentally concerning internal modulation that the bandwidth of gas lasers for small perturbation of resonator loss decreases with an increase of resonator loss contrary to the passive circuit case and depends on the dynamicQof the gas laser as an active tuned circuit rather than the resonatorQ. The measured bandwidth of 6328 Å He-Ne lasers was about 1 Mc/s. Coupling modulation has a flat frequency response above the bandwidth of gas lasers except in the vicinity of harmonics ofc/2L. Forced phase locking by the frequencyc/2Lis necessary to realize the stable low noise operation of gas lasers. The modulation method simultaneously using the composite modulation element as coupling modulation element and phase-locking element assures a signal transmission of good quality in optical communications.     

全固体蓝激光器的研究与应用

1 Introduction In comparison with traditional gas lasersand lamp pumped solid state lasers, laser diode(LD) pumped or laser diode array (LDA)pumped solid state lasers called all-solid-state la-sers are developed quickly in recent years. Withthe advantages of compact size, long lifetime,high efficiency and reliability, they have becomean important research direction in laser field.     

基于量子级联激光器的气体检测研究

随着社会的发展,对基于激光光谱技术的快速、灵敏和选择性气体探测的需求日益增加,量子级联(QC)激光器特有的高输出功率、宽调谐范围和能够在室温或者接近室温下工作的特性使它成为气体遥测的理想光源.详细描述了QC激光器,介绍了基于室温脉冲QC-DFB激光器的典型的中红外激光光谱实验装置,并探讨了QC激光器应用于气体检测的广阔前景.     

Radio frequency pumped mid-infrared waveguide lasers

RF discharge waveguide laser technology has been extended from the 10.6 μm CO2laser to include 2.7 μm HF, 3.8 μm DF, and several rare gas mid-infrared lasers. The maximum achieved electrical efficiencies of 5.3 and 4.0 percent were demonstrated in pulsed HF and DF systems, respectively. These, as well as several low efficiency rare gas lasers were demonstrated in a 20 cm gain length device. The output power and spectral distribution were determined as a function of the gas composition, pressure, velocity, and the RF power, pulse length, and repetition rate.     

同轴气体激光器二球面镜腔内光束的传输特性

本文以多程(臂)环形腔近似替代的方法分析同轴气体激光器二球面镜腔内光束的传输特性,得到一些有用的结果。     

Fast plasma mixing--A new excitation method for CW gas laser

"Fast plasma mixing" is proposed as a method to generate population inversions on electronic transitions for continuous lasers. Selective excitation is accomplished by preparing collision partners for excitation in two or more separate beams. Excitation in a well-defined reaction volume and a fast flow in combination with a suitable resonator will allow the fast removal of decay products from the active volume. This pumping method will allow the operation of new CW laser systems not possible with conventional discharges and CW operation of laser systems, which at this time can only be operated as pulsed lasers. A test device has been used to study the proposed excitation method. CW operation as a fluorine laser has demonstrated the general feasibility of this method. Of special interest are molecular lasers pumped by charge or energy transfer from atomic species or by chemical reactions and excimer lasers. These lasers may offer the capability of operating CW tunable gas lasers in the visible and ultraviolet spectral regime.     

联合二能级气体激光器中空间烧孔被消除的条件

本文指出联合二能级气体激光器(包括流动的)空间烧孔被消除的条件是短程扩散时间远小于辐射寿命;当气体极其稀薄时,空间烧孔被消除的条件是短程自由运动时间远小于辐射寿命。并给出具体的判别公式。     

Scaling of laser power with N2 partial pressure in aconvective-cooled CW CO2 laser

Diffusion-cooled and convective-cooled CW CO₂ lasers have significantly different N₂ partial pressure in their optimum laser gas mixture. While in diffusion-cooled lasers the N₂ fractional concentration is normally within 20% of the total gas pressure, it ranges up to 60% in convective-cooled lasers. By considering various effects of N₂ and solving a simplified rate-equation model analytically, the large difference in the optimum N ₂ concentrations in these two types of CO₂ laser is explained