Generation of an ultimate ultrashort pulse and development of its applications

终极超短脉冲的产生及其应用的开发

基本信息

批准号：
17205010
负责人：
IMASAKA Totaro
金额：
$ 31.87万
依托单位：
Kyushu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2007
项目状态：
已结题

项目摘要

1.We demonstrated frequency conversion of ultrashort pulses from near infrared to deep ultraviolet by means of high-order stimulated Raman scattering and coherent anti-Stokes Raman scattering in hydrogen gas. We obtained sufficient spectral range to achieve the generation of ultimate ultrashort pulse with a few femtosecond duration. We also successfully compressed a sub-50-fs deep ultraviolet ultrashort pulse the spectrum of which was broadened through nonlinear interaction in Raman active medium.2.We demonstrated that spectral broadening of near ultraviolet ultrashort pulse modulated by coherent rotational motion of molecules excited by transient stimulated Raman scattering. We also proposed that new approach to fill the dip of modulated spectrum using two types of rotational Raman coherence. This provides an 11-fs ultrashort ultraviolet pulse after the appropriate compensation of phase distortion.3.We developed a novel system for measurement of ultrashort ultraviolet pulses using a m … More ultiphoton ionization/mass spectrometer as a detector. This enabled us to successfully measure a deep ultraviolet femtosecond pulse using as nitrogen monoxide and xenon an ionization source. This opens a possibility to analyze behaviors of molecules in extreme ultrafast time region.4.We demonstrated highly sensitive detection of dioxin compound by means of gas chromatography/multiphoton ionization/mass spectrometry using a light source as ultraviolet femtosecond laser. This enabled us to detect the pentachrorinated dibenzofurans with a limit below 0.1 pg.5. We generated efficiently three-primary-color laser arising from stimulated Raman scattering and coherent anti-Stokes Raman scattering in a multi-pass Raman cell and a hollow-core photonic bandgap fiber and hollow-core capillary waveguide using deuterium and methane as a medium.6. We investigated continuous-wave generation of stimulated Raman scattering and four-wave mixing in a horrow-core photonic bandgap fiber and despertion compensated high-finesse cavity. We first demonstrated phase-matched continuous-wave four-wave mixing and highly efficient generation of anti-Stokes emission in this approach. Less

1.我们通过高阶刺激的拉曼散射和在氢气中的高阶抗螺旋散射拉曼散射，表明了超短脉冲从近红外转向深紫外线的频率转化。我们获得了足够的光谱范围，以实现几次飞秒持续时间的最终超短脉冲的产生。我们还成功地压缩了低于50-f的深紫外线超脉冲脉冲，其光谱是通过在拉曼活跃培养基中通过非线性相互作用扩大的。2。我们证明，近乎紫外线的频谱扩大了通过瞬时刺激的拉曼（Raman）的速度来填充旋转型的旋转量，从而填充了旋转型的旋转量，该分子的相干旋转动作对分子的相干旋转运动进行了旋转。两次旋转的速度均填充了两次旋转的速度。在适当的相失真补偿后，这提供了11-FS的紫外线脉冲。3。我们开发了一种新型系统，用于使用M…更多的紫外线电离/质谱仪作为检测器来测量紫外线脉冲。这使我们能够使用一氧化氮和氙气电离来源成功测量深紫外的飞秒脉冲。这为在极端超快时间区域中分析分子行为的可能性。4。我们通过气相色谱/多光子离子化/质谱法使用光源作为紫外线雌性雌性激光器来证明对二恶英化合物的高度敏感性检测。这使我们能够检测到pentachroritation的Dibenzofurans，极限低于0.1 pg.5。我们有效地产生了由刺激的拉曼散射和连贯的反stokes拉曼在多通拉曼细胞中的拉曼散射以及空心核心光子波带纤维以及使用氘和甲烷作为培养基的空心核心毛细血管波导引起的三个主要颜色激光器。我们研究了连续的波段刺激的拉曼散射和四波散射中的混合，并在霍马核光子带纤维和绝望的补偿高finital腔中进行了混合。我们首先证明了这种方法中相匹配的连续波四波混合，并高效地产生了抗螺旋发射。较少的