铜蒸气泵浦染料激光器输出功率与谐振腔结构的关系

一、引言 铜蒸气泵浦染料可调谐激光器具有重复率高、输出功率高等优点,是应用激光光谱中的重要激光器件。器件结构见图1。用Littrow光栅和平面镜组成了谐振腔。如图1的染料激光器的前腔板一般都采用平板玻璃(R=8％),其优点是装调方便,但考虑到染料槽的宽度只有0.3mm,光束的衍射角大(约2.5mard),因此谐振腔的衍射损耗大。在某些实际应用中,M_1与染料槽间往往还要留出一段距离以便插入光学元件,衍射损耗则将加大。为了提高器件的效率,我们采用凹面反射镜代替平板。     

铜蒸气激光泵浦的单模脉冲染料激光器

设计了一台铜蒸气激光泵浦的单模脉冲染料激光器,介绍了它的结构,给出采用Rh6G、RhB和Kiton Red S时的实验结果。单模平均激光功率200mW,效率4.5％,线宽100MHz,覆盖范围563～642nm。     

铜蒸气激光泵浦的染料激光器中的ASE分析

对铜蒸气激光器横向泵浦的染料激光器中的ASE特性进行了研究。在理论上,考虑染料光强的时间、空间变化关系和光谱分布以及上能级粒子数的时间、空间变化,用计算机进行差分求解,得到ASE光强、光谱分布随泵浦光强的变化,得出了不同波长ASE光的脉冲宽度的不同结果,对增益的空间分布也进行了计算。在实验上,用平均功率5W的铜蒸气激光器泵浦R6G的酒精溶液,染料在染料盒中快速流过泵浦区。测出ASE强度随泵浦光的变化关     

铜激光泵浦的高效率染料激光器

本文对铜激光泵浦的染料激光系统进行了实验研究。测量了泵浦光强、染料浓度、输出镜反射率等因素对染料激光强度的影响,找出了最佳工作状态。用若丹明B乙二醇溶液获得了29.8％的转换效率及300A的调谐范围,同时对激光器的若干参量进行了测量。     

铜激光泵浦的高效染料激光器

本文对铜激光泵浦的染料激光系统进行了研究·测量了泵浦光强、染料浓度、输出镜反射率等因素对输出染料激光强度的影响。找出了最佳工作状态,用若丹明B乙二醇溶液获得了29.8%的转换效率与300A的调谐范围,同时还进行了一些参数测量。     

染料蒸气激光器

染料激光器由于波长可调这一优异性质，被用于分光等很多的领域之中。这种染料激光器向来是利用溶剂在液体状态下使用的，近几年来把染料直接变成蒸气，使之在气体状态下振荡的研究取得了进展。和液体状态相比，使用染料蒸气时，一般认为有如下几个优点：1)热折射率变化引起的激光的扰动小。2)通过混合其他气体容易了解诸如碰撞等效应，也容易分析反应过程。3)在液体状态下由于溶剂一般要吸收紫外区域的光，所以难以得到紫外波段的振荡;与此相反，在蒸气状态下不存在这一问题，可望得到紫外波段的振荡。4)有可能直接利用放电或电子束进行激励，可望得到高效率的激光。其中的笫3)、4)优点，作为染料蒸气所特有的性质，使人尤感兴趣。     

铜蒸气激光泵浦的飞秒光脉冲染料放大器

建立了频率为８ｋＨｚ的铜蒸气激光泵浦的二级共焦飞秒光脉冲染料放大器，把从对撞脉冲锁模环形染料激光器中输出的光脉冲能量放大到０．６μＪ，放大倍数为３×１０３，放大光脉冲宽度为６０飞秒，因此得到放大光脉冲峰值功率为１０ＭＷ。     

铜蒸气激光器

以纯铜或铜的卤化物蒸气作激光工作物质,利用高重复频率谐振布鲁林放电线路激励,得到5106(?)和5782(?)激光输出.当充电电容量为1.5毫微法,充电电压6000伏,脉冲重复频率16千赫时,激光平均输出功率为1.2瓦.     

火花泵浦染料激光器

把一个短的小直径火花源和染料盒并排装在球面腔内,电输入小到5毫焦耳就可获得重复率高达2000次/秒的激射。美国联合飞机公司研究实验室的费拉尔（C. M. Ferrar)报导,在乙醇溶液里使用若丹明6G可能达到低阈值。乙醇的热光特性较差,要用水溶液来获得高重复率;在重复率为2000次/秒时,输入阈值功率增加到0.1焦耳。以使装在激光共振器上的一个未涂膜的简单玻璃标准具倾斜的方法来进行激光调谐。     

铜激光泵浦染料激光器腔结构的实验研究

对高重复率铜激光横向泵浦染料激光器的四种腔结构进行了实验研究,比较了它们的工作特性.实验发现双棱镜扩束系统加自准直光栅的腔结构最为理想.获得了线宽为0.0012nm、转换效率为7.5%,放大荧光(ASE)背景为1.5%的单纵模激光输出.     

氮分子激光泵浦POPOP染料蒸气

本文简单报导了用脉冲氮分子激光泵浦 POPOP 染料蒸气,并对电激励染料蒸气进行初步探讨。     

High power efficient dye amplifier pumped by copper vapor lasers

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.     

Time resolved beam divergence from a copper vapor laser withunstable resonator

The temporal evolution of the far-field intensity distribution (and hence beam divergence) for the output of a CVL operating with both on-axis and off-axis unstable resonators is investigated in detail. The CVL output pulse consists of several temporally resolved components, where each successive component has lower divergence approaching the diffraction limit. A comprehensive model for the divergence of each temporal component from a CVL operating with a variety of unstable resonators is presented. In this model the resonator controls the output divergence by imposing geometric constraints on the propagation of spontaneous emission on repeated round-trips through the unstable resonator equivalent lensguide. Effects of resonator asymmetry and radial gain variations on the far-field intensity distribution (and hence divergence) are evaluated. Experimental measurements of the temporal evolution of output divergence from a CVL operating with both on-axis and off-axis unstable resonators and for a variety of excitation conditions are also presented. For CVL operation at high pulse repetition frequency the ASE at the start of the laser pulse has an annular profile. This annular gain distribution is found to modify the output far-field intensity distribution of the earlier temporal components of the laser pulse. For on-axis unstable resonators these components are found to have annular far-field intensity distributions, whereas for off-axis unstable resonators they have greatly reduced but anisotropic divergence     

Near-infrared dye laser pumped by a carbazine-122 dye laser

Efficient generation of a high-power near-infrared dye laser has been achieved by pumping longitudinally with a 5321-Å pumped carbazine-122 dye laser at 7000 Å. A peak power as high as 3.5 MW at 8630 Å and peak powers in excess of 0.5 MW from 7680 to 9170 Å have been obtained.     

354.7 nm的产生及其泵浦的可调谐染料激光器

用和频的方法从Nd:YAG激光器中产生出三次谐波,输出功率为1.7兆瓦,并用它泵浦了染料激光器。染料激光的波长可调谐范围为409.3～682.3 nm。Coumarin47染料的中心波长450.0 nm处的峰值功率大于0.60兆瓦。仅用Coumarin152一种染料,调谐范围宽达104.2 nm,与其荧光谱线宽度120.0 nm相近。     

High-peak-power 532-nm pumped dye laser

A dye laser, pumped by the second harmonic of a flash-pumpedQ-switched Nd:YAG oscillator/amplifier chain is described. The dye laser produces 8-ns-long pulses with energies as great as 140 mJ and peak powers of 20 MW. At a repetition rate of 10 pulses/s, the average power obtained is 1.4 W and the conversion efficiency (532 nm to dye) is approximately 50 percent.     

Electronically tuned synchronously pumped dye laser

We have demonstrated electronically tunable pulses as short as 1.3 ps with a tuning rate of 150 Å/kV using a synchronously pumped rhodamine dye laser. Electronically tunable transform limited pulses of 5 ps duration have also been produced.     

闪光灯泵浦施主-受主染料激光器

从施主-受主染料体系出发,研究了双重染料对灯泵染料激光器输出的影响。我们认为在低浓度下,施主和受主之间能量转移主要以辐射能量转移方式进行了通过计算施主和受主的光谱转换率,得出施主-受主系统中施主和受主的浓度都低的结论;提出分离施主和受主是使用多重染料的最佳方案。在此基础上,我们在重复频率闪光灯泵浦染料激光器上进行实验,实验结果与理论分析结果相一致。