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The single-longitudinal-mode Nd:GdVO4/RTiOPO4 (RTP) solid-state Green laser operation of a laser-diode (LD) end-pumped laser is realized by multi-cavities and a Brewster plate. The LD-pumped single-frequency green laser has been demonstrated by optimizing several parameters and a cavity length, with precise temperature controlling of Nd:GdV04, RTP and laser diode. When the incident pump power is 2 W at 808.4 nm, a single-frequency cw green laser at 532nm with output 210 m W is obtained, the optical-to-optical conversion efficiency is up to 10.5%. 相似文献
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通过合理设计精密调控各元件和温控电流,得到了平均功率为70 mW,脉冲宽度为22 ns,重复频率为14 kHz,峰值功率高达230 W的Nd3+∶GdVO4/Cr4+YAG红外脉冲激光器.先采用双凸透镜组合成的望远镜系统对1 063 nm的红外激光进行扩束,再对该光束聚焦,最后经双轴晶体LBO倍频后,得到了平均功率为40.6 mW,脉冲宽度为16 ns,重复频率为14 kHz,峰值功率高达181 W的绿光激光输出,1063 nm→532 nm的转换效率高达58%.测量了532 nm的光谱线宽曲线.解释了该聚焦方法比单一薄透镜效果明显好的原因,并指出了这种聚焦方法的使用对象. 相似文献
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通过合理设计精密调控各元件和温控电流,得到了平均功率为70mW,脉冲宽度为22ns,重复频率为14kHz,峰值功率高达230W的Nd3 ∶GdVO4/Cr4 YAG红外脉冲激光器.先采用双凸透镜组合成的望远镜系统对1063nm的红外激光进行扩束,再对该光束聚焦,最后经双轴晶体LBO倍频后,得到了平均功率为40.6mW,脉冲宽度为16ns,重复频率为14kHz,峰值功率高达181W的绿光激光输出,1063nm→532nm的转换效率高达58%.测量了532nm的光谱线宽曲线.解释了该聚焦方法比单一薄透镜效果明显好的原因,并指出了这种聚焦方法的使用对象. 相似文献
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深紫外和频晶体CLBO产生193 nm激光的频率变换 总被引:1,自引:0,他引:1
简述了深紫外和频晶体CLBO的光学特性。根据相位匹配角公式、非线性有效系数公式、走离角公式和允许角公式,详细计算了CLBO晶体和频产生193 nm激光时的相位匹配角、非线性有效系数、和频时谐波走离角、允许角的具体数值。根据这些数值,并考虑产业化的要求,对目前几种和频方式进行了比较,最终选定波长为λ1=2 100 nm的o光和波长为λ2=213 nm的e光作为基频光进行和频的匹配方式。此方式相位匹配角为51.6°,具有大的非线性有效系数0.97,小的走离角3.7°,大的允许角1.9×10-6 rad·mm,是非常理想的产生193 nm激光的匹配方式。 相似文献
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设计了基于银纳米线等离子体共振效应的大孔径微流通道的类熊猫型微结构光纤传感器,采用全矢量有限元法对该传感器进行了数值研究,讨论了待测液折射率等参数对光纤传感器的损耗和灵敏度的影响。结果表明:随着待测液折射率和银纳米线直径的增大,损耗和光谱峰值λpeak都将增大;并且当银纳米线的直径增加到一定程度时,损耗和灵敏度都会呈现多峰值现象。最后取银纳米线直径d=150 nm,得到最大幅度灵敏度为910 dB/RIU,最大光谱灵敏度为1 400 nm/RIU。 相似文献
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新型光学晶体KABO的非线性频率变换特性 总被引:2,自引:0,他引:2
简述了新型非线性晶体KABO的光学特性.根据相位匹配角公式、非线性有效系数公式、走离角公式和允许角公式,详细计算了KABO晶体倍频时的相位匹配角、非线性有效系数、倍频时谐波走离角、允许角随波长变化的理论曲线.特别是对LD泵浦掺钕的全固态激光器532 nm输出时,得到了KABO晶体采用I类相位匹配进行四倍频的相位匹配角、非线性有效系数、倍频时谐波走离角、允许角分别为:58.1°、0.254×10-12m/V、2.8°、1.8233 mrad·mm;并将该晶体与目前可应用于紫外倍频的晶体比较,在考虑走离效应的情况下,研究了四倍频转换效率随KABO晶体长度、基频光光斑半径的变化规律. 相似文献
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Theoretical analysis and experimental research on thermal focal length of a YVO4/Nd:YVO4 composite crystal 下载免费PDF全文
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. 相似文献