准分子激光器中的X光预电离研究

对于准分子激光器这样的高气压脉冲放电器件，为保证放电的均匀性，预电离是必不可少的。本文详细介绍了Ｘ光预电离的产生机理及实验装置，并进行了深入的实验研究及理论分析，对实际工作有较大的参考意义。     

High-pressure xenon laser at 1730 Å

Experimental measurements are reported of optical gain due to stimulated transitions between the lowest-bound diatomic states of xenon (Xe) and the repulsive ground state. The optical gain was greatest at a wavelength of (1730 ± 10) Å, where the effective gain cross section is estimated to be7 times 10^{19}cm².     

准分子激光器的电子束预电离及X光预电离

本文从预电离电子密度、激光输出能量及放电特性等方面对用于准分子激光器的电子束预电离及X光预电离进行了研究和比较。     

自动预电离的XeCl准分子激光器

一、前言 由于准分子激光器在光化学,同位素分离、激光生物效应、微电子学,遥测及其他科技领域内日益广泛的应用的要求,准分子激光器的输出能量及效率的提高是大家普遍关心的一个问题。     

Efficient quarter-Joule KrF laser with corona preionization

Conventional KrF excimer lasers which are pumped by means of an avalanche discharge use the ultraviolet radiation generated by a series of spark discharges to preionize the discharge region in order to obtain a uniform discharge. This paper describes the design and operating characteristics of a KrF avalanche-discharge laser which uses a corona discharge to preionize the discharge region. Such a preionization technique, along with the unconventional use of Ne rather than He as the buffer gas, has enabled this laser to generate overfrac{1}/{4}J of output energy with an overall efficiency of 1.3 percent while operating at a pulse rate of 2 Hz. This same general technique has enabled us to generate 55 W of average power from a gas transport KrF laser operating at higher pulse rates.     

X-ray preionization of rare-gas-halide lasers

The preionization characteristics of X-rays for self-sustained discharge rare-gas-halide lasers are summarized. X-rays showed features superior to UV for preionization of large volume high-pressure discharge lasers, which was experimentally confirmed. Futhermore, the effect of preionization on laser output was found to depend on the spatial distribution of preionization electron density and discharge electric field. When a uniform electric field area was homogeneously preionized with a collimated X-ray, an electron density of 10⁷cm^-3was found to be sufficient for high energy extraction of a XeCl laser.     

Transversely excited waveguide HCN laser with UV preionization

In order to obtain high-power submillimeter-wave pulses, UV preionization was applied to the transverse discharges in HCN-laser gas mixtures. Homogeneous discharges were obtained at pressures up to 1 atm. An increase of laser output and working pressure was achieved for the 337-μm emission.     

小型化火花预电离TEA CO2激光器的实验研究

介绍了一种小型化火花预电离高能输出横向激励大气压(TEA)CO2激光器.激光器的主放电电极采取紧凑式Ernst电极,加大了电极间距,增大了激活区体积,从而提高了输出能量.激光器采用火花阵列预电离方式,有利于主放电均匀、稳定.低重复频率下,自由振荡情况下的输出能量可达到2 J.使用单片机控制的光栅调谐后,10P(20)谱线多模输出能量可达到1J,10 P(20)谱线输出脉冲宽度为100 ns.     

New infrared laser lines in argon, krypton, and xenon

Fourteen new infrared laser transitions in Ar, Kr, and Xe ranging from3.725 to 17.233 mum are reported. All of the Kr laser transitions and all but one of the Ar and Xe transitions have upper levels in thesordstate: the majority of the transitions satisfy the conditionDelta K = Delta J. Identification of a previously observed, unidentified laser line at 5.804 μm in Ar is given.     

脉冲预电离纵向脉冲放电CO2激光器

提出了一种横向脉冲预电离小型扩散冷却纵向脉冲放电CO2激光器。在内径7.5mm、放电长度50cm的放电区实现了脉冲能量15mJ、脉冲峰值功率375W的激光输出。脉冲重复频率56Hz。预电离电极结构设计成螺旋状,改善了激光的光束质量。     

简单紧凑的电晕预电离XeCl准分子激光器

本文报导了一台电晕预电离XeCl准分子激光器的实验研究,输出最大脉冲激光能量超过250毫焦耳。研究了各种放电参数对输出激光能量的影响。     

脉冲预电离非自持纵向放电CO2激光器

研究了脉冲预电离的非自持纵向放电CO2激光器。采用了一种新颖的螺旋形横向脉冲预电离结构。激光器的主放电和输出功率由外加的预电离脉冲控制,可省去限流电阻。最大电光转换效率达19%。     

用于准分子激光器的大面积X光源及其预电离特性

实验研究了一台大面积冷阴极二极管X光源的工作特性、X光剂量沿激光管长度方向的分布、X光强度对激光输出的影响。     

脉冲预电离高频放电板条CO2激光器

本文提出了一种脉冲预电离的高频放电扩散冷却板条CO2 激光器 ,实现了非常均匀的大面积矩形截面放电并获得了激光输出     

TEA-CO2激光器的几种典型的预电离技术

介绍了TEA-CO2激光器几种典型的预电离技术的工作原理，并时它们进行了一些初步的比较和讨论。     

双面预电离N_2激光器

在双层平板电容 Blumlein 系统激发的 N_2激光器中,采用简易的双面预电离方法(四电极激光器)提高了 N_2激光器的输出稳定度与输出功率。     

A CW CO2 laser with DC-discharge preionization

The application of the plasma-injection technique (involving DC-discharge preionization) to a CW CO₂ laser operating with recirculated gas is described. Measured characteristics of the discharges, the gain, and the output power are presented. An output of 110 W was obtained with a specific efficiency of 1.0 J/l^-1 of flowed gas at a pressure of 10 kPa. A simplified model to calculate a characteristic length of the main discharge, which is useful for design purposes, is developed. This type of laser may be scaled simply to higher output powers, requires a gas mixture with only 20% He, is compact and robust, and yet is simple in its electrical and mechanical requirements     

Effect of preionization of a copper vapor laser

It is shown that the operation of a copper vapor laser (CVL) in exeptionaly lowE/Pis due to preionization. By introducing a wire preionization to a CVL we demonstrate its influence on the laser performance. In a repetitively pulsed CVL a previous pulse can be the preionization source.     

X光预电离源实验研究

对于准分子激光器这样的高压气体脉冲放电器件,为保证放电的均匀性,预电离是必不可少的。本文介绍了X光预电离的产生机理及实验装置,并进行了详细的实验研究及理论分析,对实际工作有较大的参考意义。     

脉冲予电离横流放电CO2激光器的增益特性

本文介绍了脉冲予电离用于横流放电的原理,分析了横流CO_2激光器的增益分布和在10kW横流CO_2激光器上的实验结果。