一种适用于同轴放电环形增益区的多光程谐振腔

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.     

横流CWCO2激光器电子密度的研究

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.     

New method for lightning location using optical ground wire

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.     

新型脉冲CO2激光器预电离测量参量研究

对5 kW横流CO₂激光器脉冲预电离过程进行理论分析和实验研究.表明了预电离过程中电子密度的重要作用,它能为下一步的主放电提供良好的条件.结果表明理论分析与实验结果相符合.     

10.6μm的CO_2激光的电光频移

本文提出用CO_7激光器输出的线偏振光通过电光调制器和再生循环激光放大器,在不增大谐波分量条件下,可能大大提高转换效率,使电光频移具有广泛应用的可能性。在检验频移效果的实验中,用光束的自准往复和调制信号的空间延迟简化了实验装置。以简单的拍频方法分析了频移光的频率成分。     

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

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。     

高功率横流CO2激光器脉冲预电离过程研究

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.     

预电离脉冲群开关技术高功率脉冲CO2激光器

采用独特的电极结构和预电离脉冲群开关放电技术, 实现了5kW 量级平均功率横流CO₂激光器脉冲激光输出. 关键词： 2脉冲激光')" href="#">CO₂脉冲激光 预电离 脉冲群开关     

Micro-Gal laser absolute gravimeter based on high precision heterodyne interferometer

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.     

光纤倏逝波生物传感器及其应用

以光纤倏逝波原理，研制成功一台光纤倏逝波生物传感器。该传感器对纯净的Cy5荧光染料溶液的检测灵敏度达0．01μmo1／1；对浓度为0．01μmo1／1的嗜肺军团菌核酸样品的测量信噪比为4．61。所有检测结果与商品化生物芯片扫描仪同时检测得到的结果具有很好的一致性。