脉冲光信号的Cs原子455 nm两级法拉第反常色散滤光器特性实验研究

本文实验研究了脉冲光信号的Ｃｓ原子４５５ｎｍ两级法拉第反常色散滤光器（ＦＡＤＯＦ）的一些重要特性。给出了在所选温度的带宽和透过率与磁场的关系。与单级ＦＡＤＯＦ相比其通带宽度明显变窄、带外抑制比提高到１０－５量级     

422.7nm法拉第反常色散滤光特性

对工作在第ｇ条夫朗和费暗线（４２２．６７４ｎｍ）的法拉第反常色散滤光器的滤光特性进行了理论分析和讨论。     

脉冲光下Cs455nm法拉第反常色散谱研究

首次报道利用ＹＡＧ脉冲激光研究了Ｃｓ４５５ｎｍ的法拉第反常色散谱。初步实验结果与理论计算一致。     

459nm可调谐法拉第反常色散滤光特性

本文考虑到铯原子６Ｓ１／２→７Ｐ１／２跃迁谱线（４５９ｎｍ）的超精细结构，对铯原子气体的法拉第反应色散滤光器的透过率，中心频率调谐特性，通频带宽与外加纵向磁场强度，原子汽室温度的关系进行了理论分析。     

法拉第原子滤光器的特性及应用

以我们对铯原子法拉第反常色散原了滤光器(FADOF)的研究为基础，结合其它FADOF的研究成果．介绍了FADOF的原理、特性、以及在滤波、鉴频、磁光调制等方面的应用。     

法拉第反常色散滤光器透射谱的普遍计算方法

报道了一种计算法拉第反常色散滤光器（ＦＡＤＯＦ）透射谱的普遍方法,该方法可计算不同碱金属元素工作在任意电偶极跃迁和任意磁场强度下的法拉第反常色散滤光器透射谱,对主动式和被动式法拉第反常色散滤光器同样适用,该方法还可进一步推广到其它类型的原子滤光器（如斯塔克型原子滤光器）的计算,给出了采用这种方法对铷主动式７７５．９ｎｍ法拉第反常色散滤光器透射谱的计算结果,与实验曲线符合较好。     

强磁场中Rb D2线法拉第反常色散滤光器特性研究

报道强磁场中RbD_2线反常色散光学滤波器的理论模型与实验研究,讨论了强磁场中RbD-2线法拉第反常色散秀射谱及其磁场,温度调谐特性.     

基于商用型空心阴极灯实现的法拉第反常色散原子滤光器

基于铯原子6S_1/2-6P_3/2跃迁线,在商用型空心阴极灯中,实现了工作波长为852 nm的法拉第反常色散原子滤光器(FADOF)：当铯空心阴极灯工作电流在1～4 mA范围内时,可获得单峰、共振的线芯式FADOF;当铯空心阴极灯工作电流在6～10 mA范围内时,可获得线翼式FADOF。实验上系统测量了工作电流、轴向磁场强度、信号光功率对FADOF性能的影响,优化参数下该滤光器的透射率高达77%。     

硅基光波导中啁啾高斯脉冲在反常色散区的传输特性

本文利用激光脉冲在硅基光波导(SOI)中传播时满足的非线性薛定谔方程,采用分步傅里叶变换,数值模拟了硅基光波导中啁啾高斯脉冲在反常色散区的传播特性.通过模拟发现,三阶色散正负主要决定了脉冲的振荡波形性质,克尔效应与双光子吸收对脉冲波形起调制作用,自由载流子效应则可以忽略.初始啁啾参数的正负存在影响了脉冲的振荡强弱变化和脉冲中心的漂移的趋势,并且无论是正啁啾还是负啁啾,脉冲振荡与漂移都随着啁啾的增大而更加剧烈,同时啁啾正向增大与负向增大,都将导致脉冲展宽越严重致主峰峰值越低.     

双光束耦合两级光放大温度特性的参量理论分析

基于双光束耦合的原理提出了两级相干光放大的方法,给出了最佳泵浦分配比的概念,对其温度特性进行了详细的理论分析,结果表明所提方案是可行的.     

Experimental study of high-power pulse side-pumped Nd:YAG laser

The paper reports on the characterization of a compact and simple side-pumped 0.538 J×100 Hz pulse Nd:YAG laser. A side-pumping configuration with 100 laser diode bars is used in the laser head. We also experimentally studied the laser performance of the diode-pumped Nd:YAG laser head in the free running and Q-switched operation under different repetition rates.     

Nd:YAG laser pumped at 946 nm

A Nd:YAG laser crystal was pumped at 946 nm and lased at 1064 nm. This pump-lase format was investigated in order to reduce the quantum defect between the pump and laser photons as compared to other pump schemes of this material. To the best of our knowledge, this is the first realization of this scheme. A room temperature absorption coefficient and linewidth of approximately 0.075 cm(-1) and approximately 1 nm for 1% at. Nd(+3) concentrations were measured for the 946 nm absorption line. Those parameters impose both narrow-bandwidth pumping and a long absorption path. By increasing the laser crystal temperature above room temperature, the absorption cross sections at 946 and 938 nm increase due to enhanced thermal population of the upper energy level of the ground manifold. The possibility of exploiting this phenomenon to enhance the pump absorption is also discussed.     

1064 nm Nd:YAG laser intracavity pumped at 946 nm

We present for the first time a Nd:YAG laser emitting at 1064 nm intracavity pumped by a 946 nm diode-pumped Nd:YAG laser. A 885 nm laser diode is used to pump the first Nd:YAG crystal emitting at 946 nm, and the second Nd:YAG laser emitting at 1064 nm intracavity pumped at 946 nm. We achieved an output power of 7.97 W at 1064 nm for an absorbed pump power at 946 nm of 9.55 W, corresponding to an optical efficiency of 83.4%. The beam quality M² quality factor is about 1.1 at the maximum output power.     

Nd:YAG 1319 nm三纵模脉冲激光器设计分析

NdYAG最强的跃迁发生在 1 064 nm,其荧光线宽大多为4～6 cm-1,故NdYAG激光器通常将产生 1 064 nm多纵模输出.为获得1 319 nm输出,对主要元件的特殊膜层进行了设计,从而抑制了其他波长在腔内的振荡.讨论了标准具的波长调谐和纵模选择特性,通过调整标准具的倾角实现了对波长的调谐,通过两块厚度不同的标准具组合实现了3个连续纵模的选择,这样使得1 319 nm激光器能获得3个连续纵模的输出.     

Diode-pumped continuous-wave eye-safe Nd:YAG laser at 1415 nm

We describe the output performance of the 1415 nm emission in Nd:YAG in a plane-concave cavity under traditional pumping into the 4F5/2 level (808 nm) and direct in-band pumping into the 4F3/2 level (885 nm). An end-pumped Nd:YAG laser yielded maximum cw output power of 6.3 W and 4.2 W at 885 nm and 808 nm laser diode (LD) pumping, respectively. To the best of our knowledge, this is the highest output power of a LD-pumped 1415 nm laser.     

Diode-pumped cw Nd:YAG three-level laser at 869 nm

We report for the first time (to our knowledge) a diode-pumped Nd:YAG laser emitting at 869 nm based on the (4)F(3/2)-(4)I(9/2) transition, generally used for a 946 nm emission. Power of 453 mW at 869 nm has been achieved in cw operation with a fiber-coupled laser diode emitting 35.4 W at 809 nm. Intracavity second-harmonic generation in the cw mode has also been demonstrated with power of 118 mW at 435 nm by using a BiB(3)O(6) nonlinear crystal. In our experiment, we used a LiNbO(3) crystal lens to complement the thermal lens of the laser rod, and we obtained good beam quality and high output power stability.     

Experimental and theoretical study of the Nd:YAG laser removal of beeswax on Galician granite at 355 nm

Beeswax coatings applied to seal off the granitic surfaces of many monuments have resulted in detrimental effects with time passing. Conservation procedures must be carried out in a selective way, removing the beeswax without any degradation of the stone.     

1 319和1 338 nm双波长Nd:YAG脉冲激光输出实验研究

根据计算得到的双波长激光振荡的阈值条件,激光实验中对全反镜镀制1 319和1 338 nm的全反膜（其反射率大于99.73%,而对1 064 nm激光的反射率约为7%）;输出镜采用对1 064 nm强谱线95%的高透过率,而对1 319和1 338 nm谱线的透过率分别为34.7%,32.5%,有效抑制了强线1 064 nm振荡,成功实现了1 319和1 338 nm Nd:YAG同时双波长激光脉冲输出。当输入能量为125 J时,1 319和1 338 nm脉冲双波长激光的单脉冲总输出能量为0.89 J,电-光转换效率为0.71%,斜率效率为0.89%。输出的双波长激光的中心波长分别在1 318.8和1 338.2 nm处,谱线宽度（FWHM）分别为0.35和0.48 nm,强度之比为36:44。