紫外激光增强电离光谱方法进行火焰中痕量元素的灵敏检测

一、实验装置激光增强电离光谱的实验装置由紫外可调谐激光光源、原子化器和信号处理与检测系统等三部分组成. 激光光源是用 Quanta Ray脉冲调 QYAG倍频激光器泵浦的可调谐染料激光器,用KDP晶体倍频,采用角度位相匹配,自动跟踪调谐.脉冲重复率为10次加/s,脉宽为5ns,调谐扫描速度为0.02urn/S,线宽小于0.4Ccm~(-1)单次脉冲能量为1mJ/脉冲.激光应有恰当的强度,使原子达到饱和激发程度,以消     

用棱镜扩束的窄谱宽染料激光器

对一种用棱镜作光腔内光束扩展器，用调Q激光抽运的脉冲染料激光器的光谱调谐性能进行了实验研究。实验证明，即使染料溶液不循环，该器件也可以每秒1次的重复率工作，染料激光振荡器的输出谱宽达到0．013埃,调谐范围达到350埃，无腔内F-P标准具时，输出功率约50千瓦。     

重复率YAG激光脉冲同步泵浦染料激光器

用热稳定腔主被动锁模重复率脉冲YAG激光器的倍频光,同步泵浦R6G染料激光器。获得平均功率14mW,单脉冲峰值功率大于5MW,单脉冲宽度28ps,脉冲列重复率为20pps。可调范围为555.0至586.5nm,谱线宽度约0.1nm,最窄谱宽为0.04nm,转换效率11％的可调谐激光。     

550～689nm重复率YAG激光同步泵浦染料激光器

用重复率脉冲锁模YAG激光同步泵浦四种激光染料,获得脉冲重复率20Hz、峰值功率MW级、平均功率mW级、脉宽30ps染料激光。波长复盖范围为550.0～689.0nm,谱线宽度0.05nm。实验比较了L_D=1/2L_PF和L_D=L_P两种匹配腔的输出特性。     

等离子体复合激光的功率限制

高重复率脉冲放电激励的锶、钙高于复合激光器分别发射短波长蓝紫色430．5nm和紫外373．7nm激光，已为实验证实是气相、染料、固体等可调谐激光器强有力的系浦光源，还可直接应用于半导体微电子装配、激光制版、激光聚合、激光荧光诊断、激光光动力疗法等诸多方面．波长430．5n     

高功率脉冲染料激光振荡-放大器

报道一种用倍频Nd:YAG激光纵向泵浦、双棱镜一维扩束的染料激光系统,经过二级放大,输出总效率达31%.当泵浦光为40 mJ时,得到12.2mJ、 2MW,线宽为0.18(?)的可调谐染料激光输出,重复率可达10次/秒.     

准分子激光泵浦的皮秒染料激光器

利用准分子激光泵浦猝灭式染料激光器，获得了３０ｐｓ的可调谐染料激光脉冲输出。     

可调谐激光器（染料,固体）的现状及发展趋势

本文概要的介绍了可调谐激光器，主要是梁料及固体激光的国际国内现状及发展趋势综述了连续波，脉冲，特别是超短脉冲激光的现状及发展趋势讨论了染料与固体可调谐激光的优缺点。     

高重复率脉冲可调谐染料激光器在光谱学上的应用

本文报道利用高重复率脉冲可调谐激光器作光源所进行的光谱实验,获得脉冲激光作用下Ne的敏化荧光光谱、Ne-Cu灯的光电流信号的时间积分谱及Kr-U灯的光电流光谱。     

Nd:YAG倍频、三倍频泵浦的可调谐脉冲染料激光器

一、引言高功率窄线宽可调谐染料激光器是激光光谱学、非线性光学、光化学和激光生物学等研究领域不可缺少的工具,同时在激光同位素分离、诊断燃烧的激光、检测大气污染等方面有广泛的应用,近年来受到国内外的重视,国外已有多种商品出售。我们研制了一台用Nd:YAG激光的二次谐波和三次谐波泵浦的脉冲染料激光系统,它具有高的峰值功率、窄的线宽,可在可见区连续调谐输出。用这套系统已进行了多种非线性光学和原子分子学的研究。使用表明它是一台比较实用的脉冲可调谐染料激光     

6.7W CVL泵浦染料激光器

本文报道CVL泵浦染料激光振放系统的实验研究。详细测量了染料激光的性能,如线宽、功率、效率、脉宽、调谐范围、光谱纯度和光束质量等。对于Rh6G染料,染料激光输出平均功率达6.7W。     

A 100-W-average-power flashlamp-pumped dye laser

Average dye laser output powers greater than 100 W have been demonstrated at pulse repetition frequencies (PRF) up to 350 Hz. The dye flow was transverse to the laser axis and was pumped by a vortex-stabilized flashlamp in an elliptical reflector. Indications are that considerably more average power is attainable.     

脉冲氙离子激光器泵浦的可调谐染料激光器

脉冲氙离子激光器具有高功率输出和较长的激光脉冲宽度,而且结构简单,用它来泵浦可调谐染料激光器,引起了人们的兴趣.H(?)nsch等首先用氙离子激光器泵浦若丹明6G染料,获得了染料激光输出,以后Laird.D.Schearer等作了进一步的研究.采用染料快速流动可获得高达40%的转换效率,利用氙离子的紫外输出谱线,还可将染料激光器的输出扩展到紫外波段.     

一种新型皮秒脉冲激光器

一种新型皮秒脉冲激光器由序列脉冲激光的产生、单脉冲激光的选取、放大和倍频等部分组成,激光器工作物质选用Nd∶YAG晶体,用两个格兰棱镜分别作为起偏器和检偏器,激光器的振荡级利用被动锁模染料产生的锁模序列脉冲激光,经过单脉冲选择器选取出其中的一个单脉冲激光,再经激光器放大部分的放大和倍频晶体的倍频后,激光器最终输出能量为120mJ,脉冲宽度为100ps,波长为532nm的单脉冲激光,其功率约为1.2×109W,功率密度约为4.2×109W/cm2,系统的外触发同步精度优于2μs。     

高功率涡流稳弧闪光灯

我们研制成了用高速涡流气体产生的压力梯度场来稳定脉冲放电电弧的高功率涡流闪光灯。当工作氩气的流量为5升/秒时,已经实现了工作频率为110次/秒的万瓦放电。放电的峰值电流最大达20千安,放电闪光上升时间为1～1.5微秒,脉宽为3～4微秒,发光效率达30％。本文报告了这种灯的结构,灯的放电电路、灯内压力梯度场的分布、灯的电光特性和灯的功率平衡分析等结果。     

用于激光等离子体诊断的主被动锁模染料激光系统

本文叙述了作为激光等离子体微微秒照相脉冲光源用的染料激光系统。它采用主-被动锁模相结合的染料激光脉冲与碘激光脉冲同步工作。染料激光脉冲相对于碘激光脉冲的到达时间可以预先选择,同步精度为200微微秒。在靶照射实验中,两个脉冲的同步成功率为76％。     

Multipulse operation of a high average power, good beam qualityzig-zag dye laser

A laser pumped zig-zag dye laser operating at 568 nm with a pulse length ~2 μs has been sealed to high power using a MOPA configuration. Pulse energies in excess of 7 J with beam quality <2 XDL have been achieved under repetitively pulsed, 10 Hz operation. RMS jitter was measured as 0.12 of a 1 XDL spot. The device has operated with over 70 W output for runs up to 5 s. Substantially longer run times and output powers are possible. This device represents an advance in dye laser capabilities. Improvement in pointing accuracy of better than an order of magnitude have been demonstrated. In addition, an improvement in beam quality by about an order of magnitude has been achieved compared to other dye lasers operating in this power range     

High-power difference-frequency generation at 5-11 µm in AgGaS2

Efficient generation of high peak power and high average power difference-frequency radiation, continuously tunable over the range of5-11 mum, has been achieved by mixing the Nd:YAG laser radiation with the output of an infrared dye laser pumped by the same Nd: YAG laser in AgGaS2. Peak pulse powers as high as 180 kW with an average power output of 14 mW were obtained around 6 μm.     

Picosecond pulse measurements using the active laser medium

A simple method for measuring the pulse lengths of synchronously pumped dye lasers which does not require the use of an external nonlinear medium, such as a doubling crystal or two-photon fluorescence cell, to autocorrelate the pulses is discussed. The technique involves feeding the laser pulses back into the dye jet, thus correlating the output pulses with the intracavity pulses to obtain pulse length signatures in the resulting time-averaged laser power. Experimental measurements were performed using a rhodamine 6G dye laser pumped by a mode-locked frequency-doubled Nd:YAG laser. The results agree well with numerical computations, and the method proves effective in determining lengths of picosecond laser pulses