激光二极管抽运Nd∶YVO_4和频黄光激光器的理论及实验研究

为了达到最佳和频593nm黄色激光输出,采用激光二极管(LD)端面抽运Nd∶YVO4晶体,根据四能级系统的速率方程理论,建立了空间相关的两波长激光运转速率方程模型,由此导出两波光子数表达式。对LD端面抽运Nd∶YVO4/KTP三镜复合腔结构的腔内和频黄光激光器,在满足参与和频的两基频光光子数密度相等的条件下,理论上得到了谐振腔的各个参数。实验比较了在满足两波光子数密度相等和两波振荡阈值相等两种情况下激光器输出的593nm黄色激光功率。在抽运功率为12W时,二种情况下分别得到了410mW和340mW的黄光输出,光-光转换效率分别为3.4%和2.8%。由此可见,在满足两波光子数密度相等的条件下可以得到更高转换效率的和频黄光输出。     

Nd:YVO4复合腔激光器双波长激光输出及腔内和频研究

 采用两个重叠的共线支腔构成的三镜复合腔,实现LD泵浦的Nd:YVO₄激光器的1 064 nm和1 342 nm双波长激光运转。根据双波长振荡阈值相等条件,数值计算了1 064 nm支腔和1 342 nm支腔的腔长、支腔的输出耦合镜透过率之间的关系。合理选择两个支腔的参数,当泵浦功率13 W时,获得1 064 nm激光功率1.59 W,1 342 nm激光功率1.17 W的双波长激光输出。在满足腔内1 064 nm 和1 342 nm双波长光子数密度相等的条件下,计算了腔内和频的复合腔Nd:YVO4激光器的腔参数。采用Ⅱ类临界相位匹配KTP晶体作为和频器件,当808 nm泵浦光功率为12 W时,获得340 mW的和频593 nm激光输出。     

LD抽运Nd:YVO4/KTP复合腔和频黄光激光器

在LD抽运的三镜复合腔Nd:YVO4激光器中,采用Ⅱ类临界相位匹配的KTP晶体对1064 nm和1342 nm两种波长激光进行和频,获得593 nm黄光连续输出.理论上从速率方程出发,导出1064 nm激光谐振腔和1342 nm激光谐振腔腔长之间的关系以及两个腔的腔镜透过率之间的关系.实验中,当808 nm抽运光的功率为12 W时,和频输出的黄光功率为340 Mw.光-光转换效率为2.8%.结果表明,采用三镜复合腔结构进行腔内和频是实现593 nm黄光输出的一种有效方法.     

LD泵浦Nd:YVO_4双波长运转腔内和频491nm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%。     

高重复频率LD端面抽运声光调Q腔内倍频绿光激光器

利用LD端面抽运声光调Q Nd∶YVO4激光器作为抽运源,采用线性腔实现了KTP腔内倍频高效绿光激光的输出.在调Q脉冲重复频率为40 kHz、1 064 nm输入光的功率为1 608 mW的条件下,获得了999 mW单横模（TEM00模）的绿光输出,相应的光-光转换效率为62.1%.绿光激光器输出光谱的半峰宽小于0.11 nm,其输出功率的不稳定度为±1.2%.     

LD抽运Nd∶YVO_4自喇曼倍频黄光激光器

报道了LD抽运的自喇曼c切Nd∶YVO4调Q腔内倍频黄光激光器.Nd∶YVO4晶体同时作为激光介质和喇曼晶体,通过声光调Q技术,产生了1178.7nm的喇曼激光,经过KTP腔内倍频,输出589.4nm黄光.测量了平均输出功率随抽运功率和脉冲重复率的变化.典型的1066.7nm基频光、1178.7nm喇曼光和589.4nm倍频光的脉冲宽度分别为24.9ns、11.2ns和6.8ns.在脉冲重复率为15kHz,抽运功率为7.56W时,产生了平均功率为151mW的589.4nm光的输出.     

LD抽运Nd∶YVO4自喇曼倍频黄光激光器

报道了LD抽运的自喇曼c切Nd∶YVO4调Q腔内倍频黄光激光器.Nd∶YVO4晶体同时作为激光介质和喇曼晶体，通过声光调Q技术，产生了1 178.7 nm的喇曼激光，经过KTP腔内倍频，输出589.4 nm黄光.测量了平均输出功率随抽运功率和脉冲重复率的变化.典型的1 066.7 nm基频光、1 178.7 nm喇曼光和589.4 nm倍频光的脉冲宽度分别为24.9 ns、11.2 ns和6.8 ns.在脉冲重复率为15 kHz，抽运功率为7.56W时，产生了平均功率为151 mW的589.4 nm光的输出.     

V型腔腔内和频产生3 W连续波589 nm黄光激光器

报道了双Nd：YAG棒串接V型折叠腔腔内KTP和频全固态黄光激光器，得到了3 W连续波589 nm黄光输出.为了提高黄光输出功率，采用了两种手段：一是通过优化腔型设计使得两束基频在腔内达到了最佳的空间重合，二是通过选择合适大小的二极管激光器的抽运功率使得两束基频在腔内达到了最佳的功率配比. 关键词： 全固态激光器 Nd：YAG激光器 黄光 腔内和频     

高重复频率LD端面抽运声光调Q腔内倍频绿光激光器

利用LD端面抽运声光调QNd:YVO4激光器作为抽运源,采用线性腔实现了KTP腔内倍频高效绿光激光的输出.在调Q脉冲重复频率为40kHz、1064nm输入光的功率为1608mW的条件下,获得了999mW单横模(TEM00模)的绿光输出,相应的光-光转换效率为62.1%.绿光激光器输出光谱的半峰宽小于0.11nm,其输出功率的不稳定度为±1.2%.     

LDA抽运Nd∶YAG/KTP腔内和频589nm连续波激光器

报道了一种激光二极管阵列(LDA)抽运Nd∶YAG双波长和频黄光激光器.黄激光是由Nd∶YAG晶体的1064 nm和1319 nm谱线腔内和频产生.以KTP为和频晶体,采用Ⅱ类临界相位匹配,在12 W的808 nm抽运功率下,获得了最高功率为430 mW连续波基横模的589 nm黄激光输出,光光转换效率为3.6%,光束质量因子M2<1.2.实验结果表明采用激光二极管阵列抽运Nd∶YAG/KTP腔内和频技术是获得黄激光的高效方法,并可以应用到其它激光增益介质的两条谱线进行腔内和频,获得更多不同颜色的单谱线激光输出.     

BIBO腔内和频593 nm激光器

采用激光二极管纵向泵浦Nd∶YVO4晶体，用一个线性平凹腔实现了1064 nm和1342 nm双波长连续波振荡，经BIBO腔内和频得到了593 nm的激光输出.当泵浦输入功率为1.4 W时593 nm激光输出功率为48.5 mW. 593 nm激光功率的均方根稳定性＜2.0%，光斑椭圆度为0.90，峰-峰值噪音小于0.5%.     

Efficient generation of continuous-wave yellow light by single-pass sum-frequency mixing of a diode-pumped Nd:YVO(4) dual-wavelength laser with periodically poled lithium niobate

We report efficient generation of cw yellow light by use of single-pass sum-frequency mixing from a diode-pumped Nd:YVO(4) dual-wavelength laser with periodically poled lithium niobate. A diode-pumped Nd:YVO(4) dual-wavelength laser is implemented with a three-mirror cavity, and the optimum oscillation condition is obtained from theoretical analysis. We extracted 78 mW of power at 593 nm from 1.2 W at 1064 nm and from 1.0 W at 1342 nm in a beam with excellent quality. The output power could probably be increased to ~92 mW by antireflection coating of the crystal.     

LBO腔内和频593 nm激光器

报道了LD纵向泵浦NdYVO4晶体,经腔内和频得到593 nm激光输出的实验研究.采用一个线性平凹腔实现了1 064 nm和1 342 nm双波长连续波振荡,利用LBO腔内和频产生593 nm激光输出.在泵浦功率为1.4 W时得到593 nm的输出功率为70 mW.593 nm光束远场发散角小于1 mrad,光斑椭圆度为0.999,且具有低噪声输出特性.实验结果表明,该结构激光器是获得衍射极限全固体黄激光器的实用方法.     

Compact 584-nm light source based on sum-frequency mixing of diode pumped Nd:YLF lasers

A dual-wavelength continuous-wave (CW) diode end-pumped Nd:YLiF₄ (Nd:YLF) laser that generates simultaneous laser action at the wavelengths 1047 and 1321 nm is demonstrated. A total output power of 350 mW for the dual-wavelength was achieved. Furthermore, intracavity sum-frequency mixing at 1047 and 1321 nm was then realized in a LBO crystal to reach the yellow-green range. We obtained a total CW output power of 34 mW at 584 nm.     

Diode-pumped -switched Nd:YVO(4) yellow laser with intracavity sum-frequency mixing

A compact high-power yellow pulsed laser has been demonstrated by use of intracavity sum-frequency mixing in a diode-end-pumped Q -switched Nd:YVO(4) dual-wavelength laser. A three-mirror configuration forming two separate laser cavities is used to optimize the gain match for simultaneous dual-wavelength emission in Q -switched operation. Under the optimum cavity-length condition, the highest yellow average power is 340 mW and the peak power is 2 kW, obtained at 12.5 W of pump power.     

Dual-wavelength Nd:YAP laser at 930 and 1341 nm and sum-frequency mixing for an emission at 549 nm

A dual-wavelength continuous-wave (CW) diode end-pumped Nd³⁺:YAlO₃ (Nd:YAP) laser that generates simultaneous laser action at the wavelengths 930 and 1341 nm is demonstrated. A total output power of 778 mW for the dual-wavelength was achieved at the incident pump power of 17.8 W. Furthermore, intracavity sum-frequency mixing at 930 and 1341 nm was then realized in a LBO crystal to reach the yellow-green range. We obtained a total CW output power of 103 mW at 549 nm.     

激光二极管抽运Nd∶YVO4/LBO红光激光器研究

报道了激光二极管抽运的Nd∶YVO4晶体、LBO晶体Ⅱ类非临界相位匹配腔内倍频大功率红光激光器。通过对激光晶体热效应的考虑 ,设计了热不灵敏腔 ,采用低掺杂浓度Nd∶YVO4晶体 ,获得了 6 71nm红光的最高输出为890mW。     

LD泵浦Nd:YVO4/LBO腔内和频连续黄光激光器

用国产半导体激光二极管泵浦Nd:YVO4晶体,通过优化膜系,调节1064 nm谱线的线性损耗以达到与弱谱线1342 nm 增益匹配,在室温下实现1064 nm和1342 nm双波长连续运转,并通过Ⅰ类临界相位匹配LBO晶体腔内和频在国内首次实现593.5 nm黄色激光连续输出,当泵浦注入功率为1.8 W时和频黄激光最大输出达85 mW,光光转换效率为4.7%,功率稳定性24 h内优于±2.8%.     

Diode-pumped passively Q-switched Nd:YVO4 laser with GaAs saturable absorber

The intracavity photon density is assumed to be of Gaussian spatial distributions and its longitudinal variation is also considered in the rate equations for a laser diode(LD)end-pumped passively Q-switched Nd:YVO4 laser with GaAs saturable absorber.These space-dependent rate equations are solved numerically.The dependences of pulse width,pulse repetition rate,single-pulse energy,and peak power on incident pump power are obtained.In the experiment,the LD end-pumped passively Q-switched Nd:YVO4 laser with GaAs saturable absorber is realized and the experimental results are consistent with the numerical solutions.