闪光灯泵浦的Nd:KGd(WO4)2激光器

报道了用闪光灯泵浦的掺钕的钨酸钆镓(Nd³⁺:KGd(WO₄)₂激光器.在重复频率1Hz,脉宽120μs的灯泵下,测量了不同透过率下激光输出能量,获得最大输出能量384mJ,斜率效率1.0%,外推阈值0.54J.在调Q运行时,Nd:KGW晶体的斜率效率为0.16%,最大输出能量46mJ.     

高温LDAs侧面脉冲泵浦Nd:YAG激光器

设计了一台紧凑型高温激光二极管阵列侧面泵浦Nd:YAG脉冲激光器。通过半导体制冷器控制泵浦源工作温度在60℃,其发射中心波长为808 nm,谱线宽度为4 nm。模拟了泵浦源在40℃、50℃和60℃条件下60 s内的温度场分布。实验所用激光增益介质为Nd:YAG晶体,尺寸为φ5 mm×50 mm,掺Nd3+摩尔浓度为1.0at.%。采用磷酸二氘钾晶体作为电光调Q开关,在泵浦源电脉宽250μs,重复频率20 Hz、1 Hz条件下,获得最大能量为230 mJ、246 mJ的单脉冲输出,对应的脉冲宽度分别为8.4 ns、7.8ns。光束发散角约为1.6 mrad。设计的Nd:YAG脉冲激光器总的电-光转换效率大于4.6%。     

钛宝石泵浦的Yb:YAG晶体的激光性能

测量了Yb:YAG晶体的光谱特性,用Ar⁺离子泵浦钛宝石激光器作为泵浦源泵浦Yb:YAG晶体,采用平平腔设计,当输出耦合镜T_1.053μm=4.26%,泵浦功率为1410mW时,得到320mW1.053μm的高效CW激光输出,斜率效率为54%,外推阈值功率为203mW。     

LD侧泵浦Nd：YAG板条双程功率放大器初步研究

 对二极管激光侧泵浦Nd：YAG板条双程功率放大器进行了初步的研究,给出了激光器的数值模拟结果,建立了二极管侧面泵浦Nd:YAG板条激光主振荡-多程放大(MOPA)系统;在100Hz重复频率时,实验获得单脉冲能量为51.9mJ的输出,光束质量M ²小于2,脉冲能量起伏小于2%, 实验结果与数值计算结果相符合。     

掺铬的镁橄榄石晶体连续波可调谐激光器

本文报道了连续波Nd:YAG激光器泵浦掺铬镁橄榄石(Cr⁴⁺:forsterite)晶体获得了连续波可调谐运转,该激光器采用Nd:YAG激光器的1.06μm谱线泵浦Φ5×9mm的Cr⁴⁺:forsterite晶体.在吸收泵浦功率为8.7W时,得到1.05W的连续波输出.当在腔内放置色散元件后,其调谐范围是1186nm～1306nm,同时详细研究了输出功率随温度和输出镜透过率的变化特性.     

多波长半导体激光阵列端泵Nd:YAG脉冲激光器

研制了无温控多波长激光二极管阵列端面泵浦Nd：YAG电光调Q激光器。采用4 000 W多波长准连续激光二极管阵列作为泵浦源,快轴准直镜与透镜导管作为泵浦耦合系统,端面泵浦φ6 mm×60 mm的Nd：YAG晶体,并采用RTP晶体进行电光调Q实验。在重复频率5 Hz、室温（25℃）时,激光器获得了最大输出能量74.4 mJ、脉宽15 ns的1 064 nm脉冲激光输出,光光转换效率达到11%。在25~55℃的工作温度下,对多波长LDA的光谱特征与激光器的输出特性作了测试,激光器输出能量随着工作温度的上升而先迅速下降再逐步保持稳定,当重复频率分别为5 Hz和10 Hz时,激光器对应的最低输出能量分别为48 mJ与37 mJ。     

闪光灯泵浦的Nd∶KGd(WO4)2激光器

报道了用闪光灯泵浦的掺钕的钨酸钆镓(Nd3+:KGd(WO4)2)激光器.在重复频率1Hz,脉宽120μs的灯泵下,测量了不同透过率下激光输出能量,获得最大输出能量384mJ,斜率效率1.0%,外推阈值0.54J.在调Q运行时,Nd∶KGW晶体的斜率效率为0.16%,最大输出能量46mJ.     

高温LDAs泵浦紧凑型Nd:YAG激光器

设计了一套紧凑型高温激光二极管阵列端面泵浦电光调Q Nd∶YAG激光器。为使激光器整体结构紧凑,以高温激光二极管阵列作为泵源以有效地降低Nd∶YAG激光器散热压力。利用Ansys软件对高温激光二极管阵列工作时的温度场进行模拟。使用基于K9玻璃材质的导光锥将泵浦光耦合进Nd∶YAG晶体内。利用Traceproc软件模拟了导光锥前后端面的光场分布。采用5mm×5mm×40mm、掺杂浓度为1.0at。%的Nd∶YAG晶体作为增益介质,利用Ansys软件对200μs,250μs泵浦脉宽条件下的晶体内部温度场分布进行模拟并计算了激光器工作时的热透镜焦距。结果表明,本文设计的紧凑型激光器可以实现稳定的脉冲激光输出。在重复频率20Hz,泵浦源电压脉冲宽度250μs、300μs条件下,获得了单脉冲能量44.1mJ和50.2mJ的单脉冲输出,对应脉冲宽度分别为18.3ns和21.3ns,斜效率为12.35%和12.24%.     

用于准相位匹配的LD泵浦Nd:YAG946nm连续激光光源

本文为泵浦质子交换准相位匹配波导器LiNbO₃提供了激光光源,用808nm半导体激光器泵浦Nd:YAG晶体,在室温下获得946nm激光连续输出大于120mW,斜率效率9.8%,并且在国内首次实现了LD泵浦Nd:YAG/KNbO₃473nm蓝色激光器的连续运转,报道了初步的实验结果并对此进行了详细的分析,提出了改进方案.     

自锁模飞秒掺铬的镁橄榄石激光器的实验研究

用波长为1.06μm的Nd:YAG激光器泵浦Cr⁴⁺:forsterite晶体,实现了Cr⁴⁺:forsterite激光器的自锁模飞秒激光运转,在吸收泵浦功率为8W的条件下,得到了脉冲宽度为85fs,中心波长为1246nm,平均输出功率为200mW的稳定锁模输出。     

Compact corner-pumped Nd:YAG/YAG composite slab laser

Corner-pumping is a new pumping scheme in diode-pumped all-solid-state lasers, having such advantages as high pump efficiency, favorable pump uniformity and low cost. Compact corner-pumped Nd:YAG/YAG composite slab lasers at 1064 nm with low or medium output powers and high efficiency are demonstrated in this paper. Combined with intracavity frequency doubling by a LBO crystal, a corner-pumped Nd:YAG/YAG composite slab 532 nm green laser with a stable output is realized successfully. The experimental results show that corner-pumping can reduce laser costs greatly, release the thermal effects of slab crystals and improve the output beam quality, and that the new pumping scheme is feasible in the design of diode-pumped all-solid-state lasers with low or medium output powers.     

Nd:LuYAG混晶1123 nm被动调Q激光器

文章报道了一个二极管激光抽运的1123 nm被动调Q激光器. 激光晶体为混晶Nd:LuYAG, 饱和吸收体选为Cr⁴⁺:YAG晶体. 在连续运转情况下, 最高输出功率为2.77 W, 对应的光-光转换效率为29.53%. 调Q运转时, 在9.38 W吸收抽运功率下, 最高输出功率为0.94 W. 脉冲宽度整体在105 ns左右. 在最高吸收抽运功率下, 1123 nm激光的输出重复频率为9.40 kHz, 对应的单脉冲能量可达100 μJ, 高于目前报道的单晶Nd:YAG 1123 nm单脉冲能量, 证明其在能量存储方面较单晶Nd:YAG更具优势. 另外, 据我们所知, 这是关于混晶Nd:LuYAG 1123 nm输出的首次报道.     

氟磷酸锶晶体Cr4+:YAG被动调Q激光特性研究

采用氙灯泵浦,实现了掺钕氟磷酸锶晶体以Ｃｒ＾４＋：ＹＡＧ作为被动调Ｑ元件的１．０５９μｍ激光运转,测量了Ｃｒ＾４＋：ＹＡＧ 同小爱过率及不同泵浦能量上激光单脉冲的输出能量、脉冲宽度、重复率,给出了Ｎｄ：Ｓ－ＦＡＰ晶体Ｃｒ＾４＋：ＹＡＧ调Ｑ工作原理的方程组,数值求解该方程组得的理论结果与实验值相符。     

Investigation of a Cr: YAG passive Q-switch in CW pumped Nd: YAG lasers

This work describes the experimental results obtained on the Cr⁴⁺:YAG crystal used as a passive Q-switch in Nd: YAG lasers. In addition, the combination of a Cr⁴⁺: YAG passive Q-switch with an acousto-optical Q-switch operating simultaneously in one cavity was investigated. More than 180 W average output in the passive Q-switched mode was obtained with the C⁴⁺: YAG crystal. The pulse-to-pulse stability was better than 1%. A mode selection occurred when the laser system operated near threshold.     

High-peak power,passively Q-switched,composite, all-poly-crystalline ceramics Nd:YAG/Cr<Superscript>4+</Superscript>:YAG laser and generation of 532-nm green light

Output performances of passively Q-switched, composite Nd:YAG/Cr⁴⁺:YAG lasers that consisted of bonded, all-poly-crystalline ceramics Nd:YAG and Cr⁴⁺:YAG are reported. Laser pulses at 1.06 μm with 2.5-mJ energy and 1.9-MW peak power are obtained from a 1.1-at % Nd:YAG/Cr⁴⁺:YAG ceramics that was quasi-continuous-wave (quasi-CW) pumped with a diode laser. Single-pass frequency doubling with LiB₃O₅ (LBO) nonlinear crystal at room temperature yielded green laser pulses at 532 nm of 0.36-mJ energy and 0.3-MW peak power, with a conversion efficiency of 0.27.     

Continuous-wave and passively Q-switched Nd:GdVO4 lasers at 1.06 μm end-pumped by laser-diode-array

We demonstrated a diode-end-pumped continuous-wave and passively Q-switched Nd:GdVO₄ laser operating at 1.06 μm wavelength with a three-mirror folded resonator. The maximum continuous-wave output power of 8.18 W was obtained at the incident pump power of 22.5 W, with the corresponding optical conversion efficiency of 36.4%. For Q-switched operation, the maximum average output power was measured to be 4.64 W with the corresponding optical conversion efficiency of 25.8%, when the initial transmission of Cr⁴⁺:YAG crystal was 90%. The shortest pulse width of 83 ns, the largest pulse energy of 20.7 μJ and the highest peak power of 246.7 W were obtained when the Cr⁴⁺:YAG crystal with an initial transmission of 85% was used.     

激光二极管列阵侧面泵浦Nd：YLF激光器

报道准连续６０Ｗ激光二极管列阵侧面泵浦Ｎｄ：ＹＬＦ固体激光器的研究结果，当器件的动转重复频率为３０Ｈｚ时，得到４．４ｍＪ的１．０４７μｍ激光输出，光－光转换效率达到１８．３％，斜率效率达２４．４％。声光和电光调Ｑ，得到能量为２．２ｍＪ，脉宽分别为５０ｎｓ和３０ｎｓ的脉冲输出。     

LD泵浦Nd:YAG微片激光器

ＬＤ泵浦Ｎｄ：ＹＡＧ微片激光器结构简单紧凑，与半导体激光器相比，前者具有激光线宽窄、光束质量好、相干长度长等优点，因此在一些测量领域有着较好的应用前景。目前对ＬＤ泵浦Ｎｄ：ＹＡＧ微片激光器的实验工作主要是获得单频、单模连续输出和线性频率调制特性研究。本文综述了近几年来ＬＤ泵浦Ｎｄ：ＹＡＧ微片激光器的研究方向、成果及应用，主要介绍了各国对ＬＤ泵浦Ｎｄ：ＹＡＧ微片激光器的调频特性的研究状况     

Nd:YVO4自受激拉曼激光器调Q锁模特性

利用Nd:YVO4激光晶体的自受激拉曼效应,结合Cr:YAG被动锁模技术和倍频技术,实现了结构紧凑的1176 nm和588 nm黄光锁模激光输出。激光器为LD端面泵浦,三镜折叠腔结构,并且采用了透过率为10%的输出镜。Nd:YVO4晶体长度为10 mm,Nd3+离子掺杂质量分数为0.2%,Cr:YAG晶体的初始透过率为67%。10 W激光泵浦时,1176 nm激光平均输出功率为123 mW,调Q包络宽度为6 ns,调Q包络内的锁模脉冲重复频率高达1 GHz。588.2 nm 黄光的平均输出功率为8 mW。