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1.
LD泵浦Nd:GdVO4晶体Cr4+:YAG被动调Q激光特性研究   总被引:7,自引:5,他引:2  
考虑腔内光子数密度的空间高斯分布以及晶体热效应的影响,给出了LD泵浦Nd:GdVO4 晶体Cr4+:YAG被动调Q 1.06 μm激光的耦合速率方程组.数值求解该方程组获得了输出激光的脉冲宽度、重复率、峰值功率以及单脉冲能量随泵浦功率的变化特性,其理论值与实验结果相符.  相似文献   

2.
考虑LD泵浦光强和腔内振荡光强的空间高斯分布以及晶体热效应的影响,给出了$山东大学信息科学与工程学院!山东济南250100晶体GaAs被动调Q 1. 06μm激光的耦合速率方程组,数值求解该方程组获得了输出激光的平均输出功率、脉冲宽度、重复率随泵浦功率的变化特性,所得理论值与实验结果相符.  相似文献   

3.
赵圣之  孙连科 《光子学报》1996,25(12):1081-1085
采用氙灯泵浦新型晶体Nd:Sr5(PO4)3F,以KTP晶体腔内倍频,实现了该晶体0.5295μm绿光激光BDN染料片调Q运转。测量了输出绿光激光的特性及不同腔长和染料片小信号透过率情况下的输出能量及脉冲宽度,给出了染料片调Q腔内倍频的耦合波方程组,数值求解该方程组,所得的理论数据与实验结果较好地相符。  相似文献   

4.
高稳定LD泵浦腔内倍频Nd∶YVO4/KTP连续绿光激光器   总被引:1,自引:0,他引:1  
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KTP腔内倍频Nd∶YVO4连续绿光激光器.当晶体吸收的泵浦功率为24.56 W时,532 nm激光功率达到5.3 W,光-光转换效率达到21.6%,激光模式为TEM00模.在输出功率5W左右时,激光器1 h功率不稳定度优于0.6%  相似文献   

5.
端面泵浦双Nd: YVO4激光器中热效应对腔稳定性的影响   总被引:7,自引:6,他引:1  
利用多个激光晶体串接方式可以提高固体激光器的输出功率. 发展双Nd: YVO4晶体激光器, 将晶体的端面镀膜作为谐振腔的端面镜, 构成了平行平面谐振腔. 对平行平面谐振腔的等效腔进行了理论分析, 结果表明激光晶体吸收泵浦光产生的热透镜效应对保持腔的稳定性起到了重要的作用. 在国内首次进行了双端泵浦双Nd: YVO4激光器的实验研究, 在抽运功率为 20.74 W时获得了11 W的1064 nm TEM00模激光输出, 其光-光转化效率约为53%. 并且对于不同掺杂浓度下的实验结果进行了讨论.  相似文献   

6.
光纤耦合二极管端泵2 μm CW双掺)Tm,Ho∶GdVO4激光器   总被引:2,自引:2,他引:0  
同YLF和YAG 基质相比,在Tm-Ho∶GdVO4晶体中Tm3+离子在800 nm附近有非常强的和宽的吸收带,所以该晶体非常适合商品化的GaAlAs激光二极管泵浦.在液氮制冷晶体条件下,利用光纤耦合激光二极管及消色差光学耦合系统端面泵浦双掺5%Tm,0.5%Ho∶GdVO4晶体,在泵浦功率14 W、泵浦波长794 nm时,实现了2.048 μm激光输出,连续运转输出功率3.6 W,相应的光光转换效率为25.7%,斜率效率26.6%.相对于吸收的泵浦功率,光光转换效率为35%.由于Tm3+离子间的交叉弛豫效应,泵浦量子效率达到1.3.  相似文献   

7.
樊斌  张纪岳 《光子学报》1989,18(3):245-250
本文考虑了激光模式和泵浦光的空间分布,对线性驻波腔,我们建立了多模的麦克斯韦——布洛赫方程组,并由此导出了双模稳态条件下阈值泵浦功率和输出功率的表达式。讨论了双模Na2激光器的运转行为,以及温度,Na2蒸汽带长度及缓冲气体的压力对激光器的影响。得到了一些有用的结果。  相似文献   

8.
激光二极管bar侧面泵浦Nd:YAG激光器热效应研究   总被引:1,自引:0,他引:1  
从不同侧面泵浦方式的泵浦光强分布出发.依据热传导方程.求解出棒状激光晶体内的温度分布.计算出不同泵浦分布时的理论热透镜焦距.并进行热透镜实验。理论分析和实验表明,随着泵浦方向的增多,晶体内泵浦光强和温度分布越接近于轴向对称分布,热透镜更接近球面透镜。  相似文献   

9.
激光二极管泵浦NYAB激光器的空间分布速率方程的研究   总被引:1,自引:0,他引:1  
赵挺洁  罗遵度 《光学学报》1995,15(9):199-1204
报道了用以描述激光二极管泵浦NYAB连续激光顺空间分布特性的非线性耦合的速率方程组,和以此方程组进行的理论计算,讨论了泵浦光和激光的空间分布、晶体的最佳长度、输出镜的最佳透过率对激光器输出的影响,给出了NYAB激光器设计的一些依据。  相似文献   

10.
LD泵浦Nd∶GdVO4晶体Cr4+∶YAG被动调Q激光特性研究   总被引:4,自引:2,他引:2  
考虑腔内光子数密度的空间高斯分布以及晶体热效应的影响,给出了LD泵浦Nd∶GdVO4晶体Cr4+∶YAG被动调Q 1.06 μm激光的耦合速率方程组.数值求解该方程组获得了输出激光的脉冲宽度、重复率、峰值功率以及单脉冲能量随泵浦功率的变化特性,其理论值与实验结果相符.  相似文献   

11.
Passive Q-switching of a laser-diode-pumped intracavity-frequency-doubling Nd:NYW/KTP laser has been realized with GaAs semiconductor saturable absorber. The dependence of pulse repetition rate, pulse energy, and pulse width on incident pump power are measured. The coupled rate equations are used to simulate the Q-switched process of laser, and the numerical solutions agree with the experimental results.  相似文献   

12.
LD泵浦Nd∶YVO4/KTP内腔倍频声光调Q理论和实验研究   总被引:7,自引:0,他引:7  
赵宏明  赵圣之  杨克建  李桂秋 《光子学报》2004,33(11):1294-1297
给出了Nd∶YVO4/KTP内腔倍频声光调Q工作原理的耦合波速率方程组.实现了半导体激光器(LD)抽运折叠腔倍频声光调Q绿激光的运转,在抽运光功率3.8 W、重复频率10 kHz时,获得绿光脉冲宽度为33.2 ns,单脉冲能量为59.6 μJ, 峰值功率达到1.8 kW.数值求解耦合波方程组理论值与实验结果相符.  相似文献   

13.
By considering the Gaussian spatial distributions of the intracavity photon density and the initial population-inversion density, the coupled rate equations for a diode-pumped passively Q-switched laser with V3+:YAG saturable absorber are given. These coupled rate equations are solved numerically and the key parameters of an optimally coupled passively Q-switched laser with V3+:YAG at 1342 nm are determined. These key parameters include the parameters of the gain medium, the saturable absorber and the resonator, which can maximize the pulse energy of singly Q-switched pulse. The optimal calculations for a diode-pumped passively Q-switched a-Nd:GdVO4 laser with V3+:YAG saturable absorber are presented to demonstrate the numerical simulation applicable.  相似文献   

14.
A laser–diode-pumped passively Q-switched new type crystal Nd3+:NaY(WO4)2 (known as Nd:NYW) laser with GaAs semiconductor saturable absorber has been realized. The dependence of pulse repetition rate, pulse energy, pulse width, and peak power on pump power for different output coupler reflectivities are measured. The coupled rate equations are used to simulate the Q-switched process of laser, and the numerical solutions agree with the experimental results.  相似文献   

15.
By considering the Gaussian transversal and longitudinal distributions of the intracavity photon density as well as the walk-off effect of KTP crystal, the coupled rate equations of the doubly Q-switched intracavity-frequency-doubling Nd:LuVO4/KTP green laser with acoustic-optic (AO) modulator and GaAs saturable absorber are given. These equations are solved numerically and the doubly Q-switched green laser characteristics, such as the pulse width and the pulse symmetry, have been obtained. In the experiment, a diode-pumped doubly Q-switched intracavity-frequency-doubling Nd:LuVO4/KTP green laser with AO and GaAs is presented. This doubly Q-switched green laser can generate the almost absolutely symmetric pulse profile with the shorter pulse width and the higher power than the singly Q-switched green laser. The experimental results are in agreement with the theoretically numerical calculations.  相似文献   

16.
By considering the Gaussian spatial distributions of the intracavity photon density and the initial population-inversion density, the coupled rate equations for a diode-pumped passively Q-switched and mode-locked (QML) laser with Cr4+:YAG saturable absorber are given. These coupled rate equations are solved numerically and the key parameters of an optimally coupled passively QML laser are determined for the first time. These key parameters include the parameters of the gain medium, the saturable absorber and the resonator, which can maximize the pulse energy of singly Q-switched envelope. The optimal calculations for a diode-pumped passively QML Nd:GdVO4 laser with Cr4+:YAG saturable absorber are presented to demonstrate the numerical simulation applicable.  相似文献   

17.
By simultaneously using both an acoustic-optic (AO) modulator and a Cr4+:YAG saturable absorber in the cavity, for the first time, a diode-pumped doubly Q-switched Nd:GdVO4 laser has been realized. The pulse duration is obviously compressed in contrast to the actively acoustic-optic Q-switched laser. By considering the Gaussian transversal distribution of the intracavity photon density and the longitudinal distribution of the photon density along the cavity axis as well as the influence of turnoff time of the acoustic-optic (AO) Q-switch, we provide the coupled rate equations for a diode-pumped doubly Q-switched Nd:GdVO4 laser with both an acoustic-optic (AO) modulator and a Cr4+:YAG saturable absorber. These coupled rate equations are solved numerically, and the dependence of pulse width, pulse energy and peak power on the incident pump power at different pulse repetition rates is obtained. The numerical solutions of equations agree well with the experimental results.This revised version was published online in August 2005 with a corrected cover date.  相似文献   

18.
The dynamic and laser characteristics of the self-Q-switched Cr,Yb:YAG laser were studied by solving the coupled rate equations; the effects of the pump rate, reflectivity of the output couplers and the concentrations of the saturable absorbers on the laser performance were investigated in detail and the numerical simulation of the Cr,Yb:YAG lasers was in good agreement with the experimental data. Better laser performance of the Cr,Yb:YAG self-Q-switched laser can be obtained by using high pump rate, higher concentration of the saturable absorber and suitable reflectivity of the output coupler according to our numerical calculations. A typical self-Q-switched laser pulse of 269.5 J pulse energy with 319 ps pulse width (FWHM) at a repetition rate of 3.1 kHz can be obtained with a monolithic laser cavity, which results in 843.5 kW peak power.  相似文献   

19.
柳强  巩马理  闫平  贾维溥  崔瑞祯  王东生 《物理学报》2002,51(12):2756-2760
利用可饱和吸收半导体GaAs作为被动调Q元件和FP输出耦合镜,实现了半导体激光器(LD)抽运Nd:YVO4激光调Q运转,获得脉宽度为47ns,重复频率为1183kHz,平均功率为430mW,光束质量为M2=113的TEM00激光基横模输出,调Q抽运阈值为1700mW.并数值求解了含有GaAs被动调Q兼输出耦合的速率方程,分析了GaAs被动调Q机理以及脉宽宽度、重复频率、平均功率随抽运速率、腔长的变化关系,理论与实验结果相一致.为多功能综合型微型调Q固体激光器提供了简单有效的方法. 关键词: 被动调Q 输出耦合 GaAs  相似文献   

20.
A diode-pumped doubly passively Q-switched intracavity-frequency-doubling Nd:LuVO4/KTP green laser with Cr4+:YAG and GaAs saturable absorbers is demonstrated. This laser can generate the shorter pulse width with higher peak power compared with the singly passively Q-switched green laser with Cr4+:YAG or GaAs saturable absorber. The relations between the pulse symmetry and the ratio of the small-signal transmissions of two saturable absorbers are investigated. By reasonably choosing the small-signal transmissions of both saturable absorbers, the doubly passively Q-switched green laser can generate the much more symmetric pulse profile. The coupled rate equations are used to simulate the passively Q-switched process of the green laser by considering the Gaussian transversal and longitudinal distributions of the intracavity photon density. The numerical results of the equations are consistent with the experimental results.  相似文献   

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