LD侧泵全固态Nd∶YAG/KTP高功率连续绿光激光器

报道了LD侧泵全固态Nd∶ YAG/KTP高功率连续绿光激光器.泵浦组件为中科院半导体所生产的808 nm半导体激光器(LD)组件,由9个20 W的激光二极管组成(呈三角形等间距分布),最大泵浦功率为180 W.在平凹直腔的腔型结构下,当LD连续抽运3 mm×65 mm Nd∶ YAG激光棒时,分别选用不同长度的KTP倍频晶体,实现了II类临界相位匹配腔内倍频,最终在泵浦电流22.5 A时,获得了最大功率为21.3 W的连续、稳定532 nm激光输出,输出不稳定度优于2%,光-光(1064～532 nm)转换效率为42.6%.     

LD抽运Nd:YAG/KTP腔内倍频16W连续波绿光激光器

为了得到一台大功率连续波绿光激光器,采用9个20W的高功率半导体激光器侧面抽运Nd:YAG棒,倍频晶体选用Ⅱ类相位匹配的KTP晶体,设计了三镜折叠腔结构,使得放置倍频晶体位置处基频光的光腰稍大,从而尽量避免KTP晶体的"灰线效应",通过调节角度的办法来补偿倍频晶体热效应导致的相位失配,得到在抽运电流为19.5A时,连续波绿光输出可达16W,倍频转换效率为40%的结果。实验结果表明,Nd:YAG/KTP是产生大功率连续绿光的较佳组合。     

Characteristics and performance of high-power CW krypton arc lamps for Nd:YAG laser pumping

Experimental results are presented on the performance of CW krypton arc lamps operated at power levels up to 20 kW. These lamps are suitable for pumping of high-powered Nd:YAG lasers. Operating life and electrical and spectral characteristics of the lamps were tested as a function of arc length, bore size, and fill pressure.     

Experimental study of thermal lensing of Nd：YAG laser

Beamfocusing and higher-order wavefront distortiondue to heat dissipationinalaser gain mediumarei mpor-tant considerationsinthe design of solid-statelasers be-cause wavefront distortion can profoundly influence theperformance of a givenlaser design.Althou…     

连续Nd∶YAG稳频倍频激光器

在连续稳频Nd:YAG激光器的基础上,重新设计了腔形,使用角度匹配的KTP和MgO:LiNbO_3晶体倍频。在输入功率为2.5kW时,获得基频光800mW输出,强度波动小于2％,频率稳定性优于2MHz。同时获得50～100mW的倍频光输出,强度波动小于5％,频率稳定性优于5MHz。     

Experimental study of thermal lensing of Nd：YAG laser

Beamfocusing and higher-order wavefront distortiondue to heat dissipationinalaser gain mediumarei mpor-tant considerationsinthe design of solid-statelasers be-cause wavefront distortion can profoundly influence theperformance of a givenlaser design.Althou…     

准连续660nm Nd:YAG内腔倍频激光器的研究

研制了一台Nd:YAG内腔倍频输出660nm红光激光器。分析了腔长地激光功率的影响，采用新型径向调整式光学镜片调整架，平－平腔结构，腔长390nm，双灯泵浦，KTP晶体内腔倍频，并设置声光Q开关，获得660nm红光输出2W。     

二极管侧面泵浦连续固体激光器的研究

本文详细介绍了一个台量大输出功率的37W的二极管侧面泵浦连续固体激光器。并对不同输出功率下的光束质量进行了测量,同时还测量了冷却水温对激光器输出功率的影响。     

CW YAG激光器辐射功率稳定技术

引起激光辐射功率漂移的因素比较复杂,本文采用了两级稳定控制系统来逐级抑制YAG激光器辐射功率的涨落。第一级利用激光器本身的反馈信号来控制泵浦电源,使激光器自身维持自动平衡;第二级利用电光晶体调制装置从激光器外进一步稳定激光功率,可得到稳定的激光辐射功率,其稳定度优于0.3%/h。     

高能量1 ns Nd:YAG激光器系统

为了实现高能量、窄脉宽的输出,设计了一种半导体端面泵浦Nd:YVO4的主振荡器与功率放大器(MOPA)结构的Nd:YAG激光器。半导体端面泵浦布儒斯特切角Nd:YVO4晶体调Q主振荡器,获得了单脉冲能量0.16mJ,重复频率5Hz,脉冲宽度0.964ns的种子激光输出。通过使用光隔离器和端面切角的Nd:YAG晶体,避免了Nd:YAG双通预放大器的ASE效应,获得了单脉冲能量88mJ,脉宽0.972ns的激光输出。通过空间滤波器后,两级主放大器单通放大后,最终获得了单脉冲能量大于3.25J,脉宽1.051ns,M2为1.9,不稳定度小于±3%ns激光放大输出。     

Operation of an infrared dye laser synchronously pumped by a mode-locked CW Nd:YAG laser

Infrared dyes emitting around 1.3 μm exhibit fluorescence lifetimes τflof only ∼ 10 ps which are shorter than the duration of the pump pulses (t_{p} sim70ps). This fact results in performance characteristics different from those of visible dye lasers where the fluorescence lifetime is longer than tp. The pulse properties of IR dye lasers are investigated for various bandwidth-limiting elements. The generation of nearly transform-limited dye laser pulses as short as 6 ps-assuming a Gaussian temporal shape-is demonstrated.     

Compression of Q-switched and mode-locked CW Nd:YAG laser pulses

Using the optical compression technique with a single-mode optical fiber and a grating pair, the 85 ps pulses from aQ-switched, mode-locked CW Nd:YAG laser have been compressed by a factor of 30. On average, an overall enhancement of 7 × in the peak power was achieved.     

Modeling and CW operation of a quasi-three-level 946 nm Nd: YAG laser

A model is developed for an end-pumped quasi-three-level laser with population in the lower laser level at equilibrium such as for transitions to the manifolds⁴I9/2in Nd³⁺,⁴I15/2in Er³⁺,⁵I8in Ho³⁺and³H6in Tm³⁺. It is shown that the effect of residual lower laser level population on laser operation can be treated as a saturable loss. Room temperature operation on the⁴F3/2-⁴I9/2transition in Nd:YAG under CW dye laser pumping has been demonstrated with a threshold as low as 11.5 mW incident power and a slope efficiency of 7 percent with 0.3 percent output coupling. Performance is limited by the low output coupling and diffraction loss.     

Nd:YAG激光棒的前向光散射

从光在散射媒质中的输运方程出发,直观地引入增益函数,解出光束通过媒质后的分布函数,与实验结果相拟合,得出前向散射系数和消光系数。     

连续YAG固体激光器电源的计算机闭环控制

本文探讨一种用单片机构成的激光电源闭环控制系统.该系统以单片机8031作为控制核心,兼有调节器和触发器功能,可使激光器工作电流自动调节,实现闭环.     

LD抽运高功率连续1319nm Nd:YAG激光器的研究

报道了一台LD侧面泵浦的1319nm Nd：YAG激光器,理论分析了激光器的振荡阈值和最佳透过率,并在腔长15cm,泵浦电流23A,耦合输出镜透过率为8％的条件下,获得1319nm最大连续输出85W。     

两级串接Nd3+:YAG激光器谐振腔的研究

采用矩阵光学的方法对两种典型两级串接Nd：YAG激光器谐振腔进行了研究。结果表明：谐振腔内棒的位置直接影响了腔的稳定范围和模体积，对两种典型谐振腔来说，等间距腔的稳定范围和模体积要大得多，输出功率也更高。     

波长1319nm连续Nd:YAG激光器的研究

使用连续Nd：YAG输出1319nm，分析了波长1319nm激光的辐射跃迁能级，论述了抑制1064nm激光的生成从而提高1319nm激光输出等关键技术，研究了光学镜片的镀膜参数与腔型结构，实现1319nm激光连续输出最高功率43W。     

LD抽运Nd:YAG/KTP腔内倍频连续波1.2 W红光激光器

报道了用Ⅱ类相位匹配KTP(相位匹配角选为θ＝59.9°,Φ＝0°)对激光二极管(LD)侧向抽运的NdYAG腔内倍频的红光激光器.通过分析大功率抽运NdYAG棒热透镜效应的影响,优化设计了三镜折叠腔参数.采用镜片镀膜的方法使NdYAG工作在1319nm波长,经腔内倍频获得单一波长659.5nm的红光激光.在抽运电流13A和输出镜曲率半径为200mm时,达到1.2W的红光连续波输出.     

一种新型单纵模连续Nd:YAG激光器

获得单纵模激光输出的最基本方法是在谐振腔内插入一块F－P标准具。对于Nd:YAG激光器，其增益线宽很大，若用单F一P标准具选纵模，则它必须有足够的选择性以抑制与选定模式相邻纵模的振荡。同时它的自由光谱区还应足够大，以保证在超过阈值的增益线宽范围内