LD泵浦Nd:YVO4晶体KTP腔内倍频红光激光器

报道了激光二极管泵浦Nd∶YVO4晶体,Ⅱ临界相位匹配KTP晶体腔内倍频红光激光器.通过对激光晶体热效应的考虑,设计了热不灵敏腔 ,最大获得了273mW 671nm红光输出.     

LD泵浦Nd∶YVO4晶体LBO倍频457 nm蓝色激光器

用国产半导体激光二极管泵浦Nd∶YVO4晶体,在室温下获得914 nm激光连续输出，用Ⅰ类临界位相匹配LBO腔内倍频获得457 nm蓝色激光输出.当泵浦注入功率为1.7 W时倍频蓝激光最大输出达20 mW，光光转换效率为1.2%,功率稳定性24 h内优于±3%.     

LD泵浦Nd∶YVO_4晶体KTP腔内倍频红光激光器

报道了激光二极管泵浦 Nd∶YVO4 晶体 , 临界相位匹配 KTP晶体腔内倍频红光激光器 .通过对激光晶体热效应的考虑 ,设计了热不灵敏腔 ,最大获得了 2 73 m W671 nm红光输出     

LD泵浦Nd:YVO4晶体KTP腔内倍频红光激光器

报道了激光二极管泵浦Nd:YVO₄晶体,临界相位匹配KTP晶体腔内倍频红光激光器.通过对激光晶体热效应的考虑,设计了热不灵敏腔,最大获得了273mW 671nm红光输出.     

连续激光二极管泵浦Nd：YVO4激光器的腔内倍频

报道连续激光二极管泵浦的Ｎｄ：ＹＶＯ４激光器的腔内倍频实验结果，比较了不同掺杂浓度的Ｎｄ：ＹＶＯ４晶体的倍频输出功率，最大绿光输出功率为２２．２ｍＷ，光－光转换效率为３．５％，此外，还研究了腔内倍频的输出涨落特性。     

LD侧泵Nd:YAG/S-KTP腔内倍频高功率660 nm连续红光激光器

报道了LD侧面泵浦NdYAG/S-KTP腔内倍频高功率660 nm连续红光激光器.泵浦组件(呈三角形等间距分布)由9个20 W的激光二极管组成,最大泵浦功率为180 W.通过对谐振腔参数进行优化设计,用LD连续抽运3 mm×65 mm NdYAG激光棒时,获得了波长为1 319 nm的基频光振荡.利用S-KTP Ⅱ类临界相位匹配腔内倍频技术,当泵浦电流为22 A时,获得了6.8 W的连续红光激光输出,光-光转换效率为4.3%.     

激光二极管泵浦高效Nd：YVO4／KTP腔内倍频激光器

报道了激光二极管泵浦的高转换效率Ｎｄ：ＹＶＯ４／ＫＴＰ腔内倍频激光器，研究了泵浦光斑尺寸，谐振腔长，ＫＴＰ及Ｎｄ：ＹＶＯ４的温度对输出绿光效率的影响。在输出泵浦功率为６６９ｍＷ时，获得绿光输出功率１５４ｍＷ，光－光转换效率达２３％。     

LD泵浦Nd∶YVO_4晶体LBO倍频457 nm蓝色激光器

用国产半导体激光二极管泵浦Nd∶YVO4晶体,在室温下获得914nm激光连续输出,用Ⅰ类临界位相匹配LBO腔内倍频获得457nm蓝色激光输出当泵浦注入功率为1.7W时倍频蓝激光最大输出达20mW,光光转换效率为1.2%,功率稳定性24h内优于±3%     

高稳定LD端面泵浦腔内倍频Nd∶YVO4/LBO连续红光激光器

设计出一种能够较好地补偿激光晶体热效应的激光谐振腔,实现了高稳定LD单端泵浦LBO腔内倍频Nd∶YVO4连续红光激光器.当晶体吸收的泵浦功率为24.56 W时,671 nm激光功率达到1.203 W,光-光转换效率4.9%,激光模式为TEM00模.在输出功率为1.08 W时,激光器1 h功率不稳定度为0.52%.     

LD泵浦的Nd:GdVO4/KTP腔内倍频激光器

基于对Nd:GdVO4晶体热焦距的测量及其1.06 μm激光基本性能,用三镜折叠腔研究了半导体激光器(LD)泵浦的Nd:GdVO4/KTP晶体的内腔倍频性质.当用从直径为200 μm的单光纤输出的低功率的半导体激光泵浦时,绿光的阈值是26 mW,光光转换效率为17.3%.当用从直径为1.55 mm的光纤束输出的高功率的半导体激光泵浦时,绿光的阈值是200 mW,光光转换效率为19.35%.     

Compact diode-pumped Nd:YVO4 intracavity-doubled red laser at 671 nm

A design of diode-pumped high efficiency Nd:YVO₄/LBO laser with a compact linear cavity was reported. Employing a type-II noncritical phase-matched LBO crystal, we generated 520 mW of 671 nm in single transverse mode at 6 W of incident pump power, the optical conversion efficiency being 8.7%.     

Theoretical analysis and experimental research on thermal focal length of a YVO4/Nd:YVO4 composite crystal

This paper investigates the temperature field distribution and thermal focal length within a laser diode array (LDA) end-pumped YVO4/Nd:YVO4 rectangular composite crystal. A general expression of the temperature field distribution within the Nd:YVO4 rectangular crystal was obtained by analysing the characteristics of the Nd:YVO4 crystal and solving the Poisson equation with boundary conditions. The temperature field distributions in the Nd:YVO4 rectangular crystal for the YVO4/Nd:YVO4 composite crystal and the Nd:YVO4 single crystal are researched respec- tively. Calculating the thermal focal length within the Nd:YVO4 rectangular crystal was done by an analysis of the additional optical path differences (OPD) caused by heat, which was very identical with experimental results in this paper. Research results show that the maximum relative temperature on the rear face of the Nd:YVO4 crystal in the composite crystal is 150 K and the thermal focal length is 35.7 mm when the output power of the LDA is 22 W. In the same circumstances, the experimental value of the thermal focal length is 37.4 mm. So the relative error between the theoretical analysis and the experimental result is only 4.5%. With the same conditions, the thermal focal length of the Nd:YVO4 single crystal is 18.5 mm. So the relative rate of the thermal focal length between the YVO4/Nd:YVO4 crystal and the Nd:YVO4 crystal is 93%. So, the thermal stability of the output power and the beam quality of the YVO4/Nd:YVO4 laser is more advantageous than the laser with Nd:YVO4 single crystal.     

LD端面抽运c切Nd:YVO4自拉曼倍频589 nm黄光激光研究

报道了LD端面抽运c切Nd:YVO₄自拉曼倍频黄光激光器的研究. 采用10 mm长,二类临界相位匹配角 (θ=69°,ø=0°)切割的KTP晶体作为倍频晶体. 考虑到c切Nd:YVO₄跃迁截面较小,所以通过对谐振腔及晶体膜系的严格设计,减少腔内插入损耗和衍射损耗. 最终在脉冲重复率为10 kHz,抽运功率为11.2 W下,获得了最高570 mW的倍频黄光激光输出,对应抽运光到倍频黄光的转化效率约为 关键词： 拉曼激光 c切Nd:YVO₄')" href="#">c切Nd:YVO₄ 589 nm 黄光激光     

2.23 W diode-pumped Nd:YVO4/LBO Laser at 671 nm

A fiber-coupled diode-array-pumped, intracavity frequency doubled by a LBO crystal, high-power Nd:YVO₄ red laser at 671 nm has been developed in this paper. With incident pump power of 10.6 W, employing a type-I critical phase-matched LBO crystal, 2.23 W single-transverse-mode red light at 671 nm was obtained, with optical-to-optical conversion efficiency up to 21.0%.     

LD泵浦Nd:YVO4双波长运转腔内和频491 nm激光器

分析了Nd:YVO4激光器实现双波长运转及腔内和频的条件,利用一种LD泵浦Nd:YVO4晶体产生1 064 nm和914 nm双波长激光束,采用一个线性平凹腔结构,利用腔内Ⅰ类临界相位匹配LBO和频,获得了连续波输出的全固态激光器。实验采用端面结构,在5.0 W的808 nm泵浦功率下,获得了最高功率为2.5 mW连续波TEM00的激光输出,光-光转换效率为0.05%。     

High power diode single-end-pumped Nd:YVO4 laser

A fiber-coupled diode-single-end-pumped Nd:YVO₄ laser with an Nd:YVO₄ crystal of 0.3 at% doping concentration and 3×3×10 mm³ dimensions was reported. 14.850 W of continuous-wave output power in an M² factor of 1.12 was obtained under pump power of 27.365 W, with an optical conversion efficiency of 60.49%, and a slope efficiency of 64.5%.     

High-efficiency direct-pumped Nd:YVO4-LBO laser operating at 671 nm

The continuous-wave high-efficiency laser emission from Nd:YVO₄ at the fundamental wavelength of 1342 nm and its 671 nm second harmonic obtained by intra-cavity frequency doubling in an LBO nonlinear crystal are investigated under pumping by diode laser at 880 nm (on the ⁴F_3/2→⁴I_13/2 transition). The end-pumped Nd:YVO₄ crystal yielded a continuous-wave output power of 9.6 W at 1342 nm for 18.9 W of absorbed pump power. The slope efficiency measured with respect to the absorbed pump power is 60%. An output of 5.5 W at 671 nm was obtained by frequency doubling, resulting in an optical-to-optical efficiency with respect to the absorbed pump power of 29%. Comparative results obtained for the pump with a diode laser at 808 nm (on the ⁴F_5/2→⁴I_13/2 transition) are given in order to prove the advantages of the 880 nm wavelength pumping.     

Experimental Investigation of Thermal Lensing in End-pumped Nd:YVO4 Crystal Using a New Simple Approach

The stability of linear planar resonators involved in solid-state lasers is entirely decided by the thermal lens of the laser crystal. There exists a critical point between stable state and unstable state at which the thermally focusing point falls on the surface of one end mirror. Based on this fact, a new method for measuring the thermal focal length has been presented, and applied to three different Nd3+-doped (2%, 0.8%, and 0.5% ) Nd:YVO4 crystals at various absorbed pump power levels up to 10 W, the results show a good agreement with those of theoretical calculation. It also indicates that the thermal lensing is strongly dependent on the Nd3+-doped concentration, and is affected by crystal surface temperature, especially in the situation of weak thermal lensing.     

波长锁定878.9nm激光二极管抽运内腔式YVO_4/BaWO_4连续波拉曼激光器

采用波长锁定878.9 nm激光二极管共振抽运复合Nd:YV04激光晶体,改善热效应的同时提高抽运吸收率,分别以YVO_4和BaWO_4晶体作为拉曼介质,实验和理论研究了晶体性能、谐振腔结构和稳定性对内腔分体式连续波拉曼激光器性能的影响.结果表明:由于内腔分体式拉曼激光器腔长较长,谐振腔稳定性对激光器性能影响较大,选择高增益的拉曼晶体,不仅可获得高拉曼转换效率,还能一定程度上减轻热效应.而平凹腔结构中输出镜的曲率半径越小,拉曼晶体中基频光的功率密度越大,腔的动态稳定区越宽,获得的拉曼激光输出功率更高.最终以30 mm的BaWO_4晶体作为拉曼介质,在抽运功率25.1 W时,获得了3.02 W的连续拉曼激光输出,光-光转换效率达到12%.     

Efficient and high-power laser-diode single-end-pumped Nd：YVO4 continuous wave laser at 1342nm

A compact, efficient and high-power laser diode （LD） single-end-pumped Nd：YVO4 laser with continuous-wave emission at 1342 nm is reported. With a single crystal single-end-pumped by fibre-coupled LD array, an output power of 7.36W is obtained from the laser cavity of concave-convex shape, corresponding to an optical-to-optical efficiency of 32.8%. The laser is operated in TEM00 mode with small rms amplitude noise of 0.3%. The influences of the Nd concentration, transmissivity of the output mirror and the cavity length on the output power have been studied experimentally.