铬镱铒共掺磷酸盐玻璃光谱和激光性质研究

测定了Cr14 - 05铬镱铒共掺磷酸盐玻璃的主要热光参数,并测试了吸收、荧光光谱和激光性能等。结果表明该玻璃具有较好的光谱和热光性质,其激光输出性能可满足人眼安全激光测距光源应用的要求。     

小型激光等离子体软X射线源辐射特性研究

研制了一种高重复频率小型激光等离子体软Ｘ射线源，其发射重复性涨落优于±４．５％。采用光谱学诊断方法系统研究了光源的软Ｘ射线辐射特性。     

“点投影”keV波段X射线吸收谱的实验技术研究

报道了一项高密度激光等离子体ｋｅＶ波段Ｘ射线吸收谱工作。实验上采用称为＂点投影（ＰｏｉｎｔＰｒｏｊｅｃｔｉｏｎ）＂的靶场光学方案，成功地获得了高空间分辨（＜２４μｍ）的类氦铝１ｓ２－１ｓ２ｐ及类氖锗２ｐ－３ｄ共振吸收谱信号，为Ｘ激光及激光核聚变研究提供了一种新的参量诊断方案。     

激光等离子体软X射线量的初步测量

研制了一种脉冲重复频率为１０ＨＺ的激光等离子体软Ｘ射线源。采用Ｘ射线能量计对光源的单脉冲Ｘ射线能量进行了测量并讨论了其结果。     

X射线激光的新进展

自１９８４年首次实现软Ｘ射线放大以来，已经过去１０多年。在此期间，软Ｘ射线激光取得突出进展。为使软Ｘ射线激光成为实验室工具，对它进行了广泛研究，本文回顾了在多种研究途径中所作的努力和所取得的进展。采用高强度超短激光的光电场感生电离法是很有希望的一种。本文讨论了两种软Ｘ射线激光，它们分别基于光电场感生电离后产生的复合和电子碰撞激发。     

X射线激光开拓新应用领域

论述了Ｘ射线激光所开拓的一析的科学前沿。除用以观察活细胞的Ｘ射线显微术的颇有希望的应用外，Ｘ射线激光还可望将各种光电子显微镜推进至较高空间 时间分辨率。Ｘ射线脉冲与光学激光的非线性混频可望扩展波长可调谐性。用光学激光激励并用Ｘ射拇激光探测将是Ｘ射线激光最有希望的应用之一。     

13nm投影光刻用激光等离子体软件X射线源

软Ｘ射线投影光刻能够制作出特征线宽小于０．１μｍ的线条。激光等离子体源的研究是软Ｘ射线投影光刻中几项关键技术之一。本文报道了１３ｎｍ投影光刻用激光等离子体软Ｘ射线源。     

达到饱和的X射线激光器

达到饱和的Ｘ射线激光器光频和红外波段工作的激光器在６０年代初期便已存在，但软Ｘ射线范围（＜３０ｎｍ）的激光至１９８４年才作演示。现在，欧洲和美国的两个研究组已实现２３．６ｎｍ和２０．６ｎｍ波长工作的饱和Ｘ射线激光运转。饱和是软Ｘ射线激光器的一个重要里...     

软X射线激光全息术及其计算机模拟仿真

软Ｘ射线激光全息术采用短波长Ｘ射线激光光源，从而可获得空间分辨率很高的三维全息图，但目前它还存在许多问题。用计算机来模拟仿真提供了一种有力手段。本文采用方块、英文字母、汉字等作样品，对无透镜傅利叶变换软Ｘ射线激光全息术作了模拟仿真，其结果和可见光全息实验及理论都相符合。     

运算放大器x和γ射线辐射损伤的比较

比较了运算放大器Ｘ和γ射线射环下性能的变化，Ｘ射线对运放产生的剂量增强效应也作了研究。实验测量Ｘ射线对几种典型运放的相对剂量增强系数的范围为３．４－１２．３。     

自由电子抽运X射线激光的理论探讨

X射线激光是激光物理与等离子物理中的一个重要研究领域。目前，X射线激光研究多采用毛细管放电、高功率激光的多脉冲和短脉冲等抽运方式，而且绝大多数研究局限于软X射线波段。借鉴自由电子激光器的组成结构，提出一种产生X射线激光的新方案：用钨制成毛细管的空心电极取代自由电子激光器内的摇摆器，内充特定金属蒸气，如铜蒸气之类，使自由电子激光器变成自由电子抽运X射线激光器。运用电子碰撞电离、强流粒子束平衡体系理论方程与等离子复合特性等理论对这种新型X射线激光器的工作原理及其方案的可行性作了进一步的理论分析与探讨。     

瞬态碰撞激发X射线激光研究进展

瞬态碰撞激发X射线激光由于其所需驱动能量低、效率高和容易台式化等优点,极大地推动了X射线激光的发展。比较详细地总结了这一研究领域取得的突破性进展,并讨论了开展瞬态碰撞激发X射线激光的关键问题。     

毛细管放电软X射线激光研究进展

近几年来实用型、台式软X射线激光器发展非常迅速，特别是毛细管放电抽运的X射线激光源，已经获得46.9nm近1mJ激光输出，重复率4Hz。该台式激光器在等离子体诊断、物质烧熔等方面已经开展了初步的应用实验。本文首先简介了利用毛细管放电抽运X射线激光器的两种物理机制：电子碰撞机制和三体复合机制。然后着重介绍毛细管放电碰撞机制软X射线激光的研究进展，包括实验方案、实验装置、增益测量实验及初步的应用。对毛细管放电软X射线激光的几个关键性问题进行了讨论。     

软X光激光用多层膜反射镜的制备与检测

介绍在制备和检测软Ｘ光激光用多层膜反射镜中听做的研究工作。重点是制备过程，包括基板、镀膜设备、膜厚控制方法，以及经大量实验得出的镀膜工艺条件、给出了利用Ｘ光射线衍射仪所做的周期结构检测结果，以及利用激光等离子体作光源的精密反射率计所作的反射率测量结果。最后，对工作进展和存在的问题做了简略评述。     

High repetition rate collisional soft X-ray lasers based on grazing incidence pumping

We discuss the demonstration of gain-saturated high repetition rate table-top soft X-ray lasers producing microwatt average powers at wavelengths ranging from 13.9 to 33 nm. The results were obtained heating a precreated plasma with a picosecond optical laser pulse impinging at grazing incidence onto a precreated plasma. This pumping geometry increases the energy deposition efficiency of the pump beam into the gain region, making it possible to saturate soft X-ray lasers in this wavelength range with a short pulse pump energy of only 1 J at 800-nm wavelength. Results corresponding to 5-Hz repetition rate operation of gain-saturated 14.7-nm Ni-like Pd and 32.6-nm line Ne-like Ti lasers pumped by a table-top Ti:sapphire laser are reported. We also discuss results obtained using a 1 /spl omega/1054-nm prepulse and 2 /spl omega/527-nm short pulse from a Nd:glass pump laser. This work demonstrates the feasibility of producing compact high average power soft X-ray lasers for applications.     

Short-wavelength lasers

The development of short-wavelength lasers is reviewed. Three pumping mechanisms have been demonstrated which produce lasing at wavelengths from 3 to 100 nm. These mechanisms include electron-collisional excitation, electron-ion recombination, and photo-excitation. Examples of X-ray lasers and future directions of the field are discussed     

All-optical flip-flop based on coupled laser diodes

An all-optical set-reset flip-flop is presented that is based on two coupled lasers with separate cavities and lasing at different wavelengths. The lasers are coupled so that lasing in one of the lasers quenches lasing in the other laser. The flip-flop state is determined by the laser that is currently lasing. A rate-equation based model for the flip-flop is developed and used to obtain steady-state characteristics. Important properties of the system, such as the minimum coupling between lasers and the optical power required for switching, are derived from the model. These properties are primarily dependent on the laser mirror reflectivity, the inter-laser coupling, and the power emitted from one of the component lasers, affording the designer great control over the flip-flop properties. The flip-flop is experimentally demonstrated with two lasers constructed from identical semiconductor optical amplifiers (SOAs) and fiber Bragg gratings of different wavelengths. Good agreement between the theory and experiment is obtained. Furthermore, switching over a wide range of input wavelengths is shown; however, increased switching power is required for wavelengths far from the SOA gain peak     

AM and FM quantum noise in semiconductor lasers--Part II: Comparison of theoretical and experimental results for AlGaAs lasers

Four different theoretical formulations for AM and FM quantum noise properties in semiconductor lasers are compared with each other for AlGaAs lasers. These formulations are based on van der Pol, Fokker-Planck, rate, and photon density matrix equations. Experimental results with AM noise spectra, FM noise spectra, and spectral linewidths for four different types of AlGaAs lasers are also delineated and compared with the theoretical predictions. The spontaneous emission coefficient β and population inversion parameter nsp, which are basic parameters for determining the quantum noise properties of semiconductor lasers, were calculated by the density of states with Kane function interpolated to Halperin-Lax bandtail and the Stern's improved matrix element. Experimental AM and FM quantum noise properties show good agreement with the theoretical predictions derived through use of estimated β and nspvalues.     

Semiconductor optoelectronic devices for free-space optical communications

LIGHT emitting devices based AlGaAs lasers are very useful radiation sources in free-space opticalcommunications systems. Following a brief review of the properties of individual injection lasers, more complex devices are described. These include (or are relevant to) monolithic integration configurations of the lasers with their electronic driving circuitry, power combining methods of semiconductor lasers, and electronic methods of steering the radiation patterns of semiconductor lasers and laser arrays. Fabrication of such devices is one of the major prerequisites for realizing fully the potential advantages of free-space optical communications.     

两台非全同激光器的混沌同步

对空间上相互耦合的两台非全同固体激光器的动力学行为进行了分析。当两台激光器的抽运受到调制而每台激光器的损失不同时 ,两台激光器输出的强度会出现周期性运动、混沌同步和失去同步的情况。激光中混沌同步的发生 ,同两台激光器之间的耦合程度有关。当耦合较强时发生周期性运动 ,耦合适中时处于混沌状态 ,在特定条件下产生混沌同步 ,而耦合较小时 ,两台激光器的振荡就相对独立。