权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Development of High Power-Tunable-Vacuum UV Laser Source

高功率可调谐真空紫外激光源的研制

基本信息

批准号：
09555011
负责人：
SASAKI Takatomo
金额：
$ 8.38万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

项目摘要

The results obtained in this research are summarized as followings.A compact Vucuum Ultra-Violet (VUV) light source has been produced by SRS of H2 gas as pumped by a compact solid-state deep-UV radiation. By using the 5w generation from CLBO crystal, VUV pulses generation has been investigated. A pump pulse of 213 nm with energy of 100 ml and 3 nanoseconds pulse duration was introduced to a 800-mm-long Raman cell. By using a Pellin-Brock prism, scattered pulses from the Raman cell were separated into various frequency components, each of which was detected by a biplanar phototube and a solar-blind photomultiplier.Since the optimal gas pressure for anti-Stokes stimulated Raman scattering depends on the experimental configuration such as the focusing geometry, the output energies of various anti-Stokes components were measured as a function of 112 pressure. The results show that the H2 gas pressure of 2.5 kg/cm^2 was optimal for the generation of most anti-Stokes VUV pulses. In the following experiment, the pressure was fixed to this value.The generated VUV pulses are 195.7, 181.0, 168.3, 157.3, 147.6, 139.1, 131.5, and 124.7 -nm for first to 8th order anti-stokes waves, respectively. The 3rd-order anti-Stokes pulse at 168.3 nm had an energy greater than 1 mJ/pulse. The output energies in the VUV region are ten times higher than those initiated by 4w generation of the Nd : YAG laser.

主要研究结果如下：利用固体深紫外光源泵浦H2气体受激喇曼散射产生小型Vucuum紫外光源。利用CLBO晶体产生的5 W光脉冲，研究了真空紫外光脉冲的产生。将具有100 ml能量和3纳秒脉冲持续时间的213 nm泵浦脉冲引入到800 mm长的拉曼池中。利用Pellin-Brock棱镜将拉曼池的散射光分离成不同的频率分量，并分别用双平面光电管和日盲光电倍增管进行检测，由于反斯托克斯受激拉曼散射的最佳气压取决于实验配置，如聚焦几何结构，因此测量了各种反斯托克斯分量的输出能量随112气压的变化。结果表明，2.5 kg/cm^2的氢气气压是产生大多数反斯托克斯真空紫外脉冲的最佳气压。在接下来的实验中，将气压固定为该值，产生的VUV脉冲对于第一至第八阶反斯托克斯波分别为195.7、181.0、168.3、157.3、147.6、139.1、131.5和124.7 -nm。在168.3 nm处的第三阶反斯托克斯脉冲具有大于1 mJ/脉冲的能量。在真空紫外区的输出能量比4 W产生的Nd：YAG激光器高10倍。