共查询到19条相似文献,搜索用时 62 毫秒
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为获得接近衍射极限发散角的铜激光,设计了共焦及平凹二种自滤波非稳定腔并研究了它们的输出特性,分别获得了发散角为2.5倍及1.4倍衍射极限的铜激光。 相似文献
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自加热式铜蒸气激光器的热气体透镜研究 总被引:1,自引:1,他引:0
本文分析了自加热式铜蒸气激光器放电管内的热气体透镜效应,并指出不同的铜蒸气激光器在稳定工作时可能等效为正透镜,也可能等效为负透镜。在实验部分,本文给出了热气体透镜焦距与输入功率、缓冲气体压强的关系,描绘了热气体透镜从负透镜变化到正透镜的动态过程。 相似文献
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To obtain the maximum output of a copper vapor laser (CVL), 8 parameters of the CVL system including the length and radius of the laser tube, the peak voltage, the repetition frequency, the wall temperature and the LC parameters of the discharge circuit are optimized by using a genetic algorithm. The optimization has increased the laser power by 89% from primary 91 W (corresponding to the empirical configuration for the CVL system used in an experiment) to 172 W (the efficiency has also been increased from primary 1 to 1.16%). 相似文献
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Rapid growth of copper dendrites on the surface of copper metal has been observed in the discharge region of a large-bore (80 mm diameter) HyBrID copper vapor laser. The dendrites have the shape of deposit morphology. And the maximum average growth rate is around 0.25 mm/h in height and width. Also, a dendrite of 25 mm in maximum height and width appears after an operating time of 150 h. As a result, the average laser output power decreases to 75% of the initial level of the output power owing to the dendrites obstructing the laser beam. 相似文献
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Study on transient mode formation of copper vapor laser with a modified of f-axis unstable resonator¥HUARenzhong;LIANGPeihui;... 相似文献
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采用体光栅对商用线阵半导体激光器进行线宽压缩,得到线宽0.1 nm、中心波长780.2 nm、最高连续输出功率80 W的泵浦激光输出。为了降低热效应,通过外加斩波器将泵浦光转化为脉冲模式,脉宽440 μs,占空比为1∶5。采用长度为5 mm的铷金属饱和蒸气作为增益介质,并在常温下充入33 kPa乙烷和47 kPa氦气,进行了出光实验。在泵浦峰值功率35.4 W,铷吸收池温度120 ℃时,得到峰值功率600 mW的795 nm铷激光输出,斜率效率为1.7%。 相似文献
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采用体光栅对商用线阵半导体激光器进行线宽压缩,得到线宽0.1nm、中心波长780.2nm、最高连续输出功率80W的泵浦激光输出。为了降低热效应,通过外加斩波器将泵浦光转化为脉冲模式,脉宽440μs,占空比为1∶5。采用长度为5mm的铷金属饱和蒸气作为增益介质,并在常温下充入33kPa乙烷和47kPa氦气,进行了出光实验。在泵浦峰值功率35.4W,铷吸收池温度120℃时,得到峰值功率600mW的795nm铷激光输出,斜率效率为1.7%。 相似文献
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Silica core–silver shell, silver nanoshells (NSs), have been synthesized by an innovative laser-based approach. The NSs’ nucleation and growth progressed upon the pulse strikes of a copper vapor laser on a colloidal solution containing silver and silica nanoparticles (NPs). The silver NPs were separately synthesized by ablation of a silver target in deionized water by a 1064 nm Q-switched Nd:YAG laser. The dependence of silver NSs’ growth on the laser exposure time has been systematically studied by UV–VIS absorption spectroscopy technique. Transmission electron microscopy was exploited as well to visually confirm the NSs’ evolution through the process. 相似文献