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本文给出了对高功率横流CO_2激光器脉冲预电离过程的理论和实验研究.表明了预电离过程中光电离的重要作用.实验结果表明,脉冲预电离可增大高功率横流CO_2.激光器的pd值(p为放电气压、d为放电间隔),增大放电区注入功率密度.对于提高此类型激光器的放电稳定性和输出激光功率是一种技术简单而有效的手段. 相似文献
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横流CWCO2激光器电子密度的研究 总被引:2,自引:1,他引:1
用Langmuir静电探针测量5kW横流CO_2激光器放电等离子体,根据P.R.Smy流动等离子体厚鞘理论进行分析,表明在工作气压力为42Torr、放电电流为10~20A的情况下,电子密度约为(1.7~3.1)x10~(11)cm~(-3)的范围内,并沿流向成非均匀分布,其极大值出现在距阳极板上游边沿3cm处.电子的连续性方程给实验结果以解释,理论与实验较好地符合. 相似文献
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一种适用于同轴放电环形增益区的多光程谐振腔 总被引:2,自引:0,他引:2
本文给出了由两块环形球面镜组成的适用于同轴放电环形增益区的多光程振荡器的设计及光束特性.在该类型的多光程谐振腔中,在环形球面镜表面的不同转折点上,光束尺寸量周期性地变化.如果这种类型的多光程谐振腔与假设所有转折镜都为平面镜的情况比较,前者的激活体积比后者要小得多.因此,该类型多光程谐振腔更加适用于具有较小电极间隙的同轴放电激光器. 相似文献
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高功率横流CO2激光器高反膜耦合窗口ZnSe热形变理论和实验研究 总被引:4,自引:1,他引:3
给出高功率横流CO2激光器高反膜红外膜红外耦合窗口ZnSe的热形变理论和实验。在合理近似条件下,导出ZnSe窗口温度分布和热形变的理论表达式。理论和实验相符。 相似文献
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A new technology of lightning location is described, which is based on detecting the state of polarization (SOP) fluctuation of the laser light in the optic ground wire (OPGW). Compared with the conventional lightning location method, the new method is more accurate, more stable, and cheaper. Theories of Stokes parameters and Poincare sphere are introduced to analyze the SOP at the lightning strike point. It can be concluded that although the initial points of SOP on the Poincare sphere are random, the SOP fluctuation generated by lightning strike can still be accurately identified by detecting the velocity of polarization motion. A new algorithm to quantify the velocity is also introduced. 相似文献
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A micro-Gal absolute gravimeter based on high-precision and high-stability heterodyne interferometer is presented.The distance measuring technology of the gravimeter is studied in detail.The experimental results of distance measuring for a free-falling motion show that the high-precision heterodyne interfer- ometer described in this paper can meet the demand of a micro-Gal absolute gravimeter with relative uncertainty of 6.4×10~(-9).Moreover,the heterodyne interferometer is more stable than the Mach-Zehnder interferometer(MZI)which is widely used in present absolute gravimeters. 相似文献
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5kW横流CO2激光器输出偏振特性研究 总被引:2,自引:0,他引:2
对采用Π型折叠光腔的工业用5KW横流CO2激光器的输出偏振特性了实验研究和理论分析,结果表明:其输出为垂直于光腔平面的100%的线偏振光。 相似文献