共查询到19条相似文献,搜索用时 125 毫秒
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美国于1966年研究纯铜为工作物质的激光器,这个激光器为金属原子激光器,具有量子效率高、增益高以及激光波长(5106A和5782A)处于可见光波段的特点。1977年开始研究卤化铜激光器,使得工作温度由纯铜工作温度1600℃左右下降到400℃左右。这种器件以双脉冲方式工作:第一个脉冲把卤化铜分解为纯铜和卤族元素,第二个脉冲激发基态铜原子产生铜蒸汽激光。两个脉冲之间有一最佳时间间隔,可以得到最佳输出。这种器件用电炉加热,以便获得激光动力学所要求的卤化铜蒸汽压和 相似文献
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运用概率论方法导出了铜蒸气激光链中激光脉冲抖动量的表达式,结果表明:当铜蒸气激光器并联时,两台激光器输出光脉冲之间的抖动量的平方等于每台激光器输出光脉冲相对于电触发脉冲抖动量的平方和;当多台铜蒸气激光器串联放大时,第m台激光器输出光脉冲相对于振荡器输出光脉冲的抖动量随m的增加而增加,但总是小于每台激光器放电脉冲抖动量的2~(1/2)百倍。实验结果与理论计算基本相符。 相似文献
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铜原子能级中存在着两个亚稳态能级(4d~94s~(22)D_(3/2)和4d~94s~(22)D_(5/2)。它们分别是铜蒸气激光器578.2nm和510.6nm激光跃迁的下能级。过去已经在CuCl正柱放电管中测量过这二个亚稳态能级的寿命,在不同的条件下,得到的结果也不尽相同,大致在10到100μs的范围内。利用HCD灯,我们发展了一种新的利用窄脉冲放电激发HCD灯产生Cu亚稳态粒子并在放电结束后测量共振激光感生荧光强度随激光脉冲对放电脉冲延迟时间的衰减关系来测量亚稳态寿命的方法。这里的激光波长共振于下能级为亚稳态的跃迁,即510.6nm: 相似文献
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N/A 《激光与光电子学进展》1974,11(9):44
铜蒸气激光器在可见光谱区可能具有高效率,最初曾引起许多研究者的兴趣,但是其典型运转温度为1500 ℃这一点却阻碍了这种激光器的研制。美国喷气推进实验室的陈(C. J. Chen),内尔海姆(N. M. Nerheim)和拉塞尔(G. R. Russell)报导,以氯化亚铜为激射物的双放电铜蒸气激光器在400 ℃下运转。第一个脉冲被认为是分解脉冲,产生铜和氯原子;第二个脉冲大概就是泵浦脉冲。在396 ℃和180微秒的脉冲间延迟情况下获得30千瓦的峰值功率。 相似文献
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友清 《激光与光电子学进展》1994,31(8):28
尤里卡开发铜蒸气激光的应用钢蒸气激光器是现今可购到的最高功率可见光激光器,也是涉及六个国家20多个公司、研究所和大学的尤里卡计划的主题。为研究铜蒸气激光器在铜或铝精密打孔等方面的潜在应用(用其它激光器不可能在这种材料上打精密小孔),他们正在铜蒸气激光... 相似文献
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臧国丰 《激光与光电子学进展》1985,22(12):22
卤化铜激光器是发展铜蒸气激光器的另一种很有前途的途径。这类激光器在低温下运转,只需使用构造简单的石英管,并且大大缩短了达到最隹运转阶段的时间(少于10分钟)。某些研究已经表明,在大致相同的运转条件下,CuCl、CuBr激光器和纯铜激光器的输出特性并无多大差别。但是卤化铜激光器却存在着一个实际问题,即它们的寿命较短。 相似文献
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赵伯林 《激光与光电子学进展》1985,22(11):13
釆用加热金属产生蒸气的方法,就能得到各种金属蒸气激光器。其中,铜蒸气激光器因具有高增益、高输出功率和产生高重复脉冲振荡等特点而引人注目。但是,为了从 金属铜得到激光器工作所需的蒸气压,必须把金属铜加热到1400~1500 ℃。 相似文献
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陶永祥 《激光与光电子学进展》1986,23(5):12
卤化铜激光器给铜蒸汽激光器发展提供了另一种颇具前景的发展途径。卤化铜激光器在比较低的温度下工作,因此它可使用简单的石英管结构,并使达到最佳工作范围的时间明显缩短(短于10分钟)。一些研究工作已经证明,在近似相等工作条件下,CuCl、 CuBr激光器和纯铜激光器的输出特性彼此差别不大。但卤化铜激光器存在寿命过短的问题。 相似文献
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Time-resolved measurements of copper and neon buffer gas excited-state densities in a copper vapor laser (CVL) during the excitation pulse and early afterglow are reported for both optimum and nonoptimum power-input conditions. The optimum condition results demonstrate that the termination of the laser pulse in the CVL is due not only to filling of the lower laser level, but also to a reduction in the upper laser-level pumping related to the collapse of power input to the plasma during the excitation pulse. Time-resolved measurements of excited-state densities over a wide range of input-power conditions clearly illustrate that the increase in copper density with power input reduces the peak electron temperature in the plasma during the excitation pulse. This reduction in peak electron temperature is important in limiting the scaling of CVL output power with input-power-copper density 相似文献
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Parametric study of the CuBr laser with hydrogen additives 总被引:8,自引:0,他引:8
Astadjov D.N. Vuchkov N.K. Sabotinov N.V. 《Quantum Electronics, IEEE Journal of》1988,24(9):1927-1935
A systematic investigation of the electric parameters of the CuBr laser plasma during the excitation pulse in their correlation to the laser output characteristics is presented. Based on the electric parameters, the temporal course is calculated of the electron density during the discharge. The authors offer a simple mechanism which generally explains how the hydrogen occurred in the copper vapor laser. The mechanism consists of shielding copper ionization by the process of electron detachment from negative hydrogen ions 相似文献
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High power efficient dye amplifier pumped by copper vapor lasers 总被引:3,自引:0,他引:3
An extensive study has been performed on a dye amplifier pumped by copper vapor lasers. The amplifier utilizes a transverse pumping configuration in which the dye flow, pump beam, and dye extraction beam are mutually orthogonal. The operating characteristics of the amplifier have been studied using four dye-solvent systems which span the wavelength range continuously from 560 to 690 nm. Optimum conversion efficiencies of 18-30 percent at output powers of 0.41-0.76 W have been measured from the four dyes at a 6 kHz pulse repetition rate. The efficiencies and output powers were limited only by the available copper laser pump power. Analytic expressions have been obtained for the amplifier power gain and efficiency using a rate equation treatment of the system dynamics. Excellent agreement is obtained between the predicted and measured amplifier gain characteristics for rhodamine 6G. 相似文献