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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.利用氢气中高阶受激拉曼散射和相干反斯托克斯拉曼散射实现了超短脉冲从近红外到深紫外的频率转换。我们获得了足够的光谱范围，以实现最终的超短脉冲的产生与几个飞秒持续时间。我们还成功地压缩了一个亚50 fs的深紫外超短脉冲，并利用拉曼激活介质中的非线性相互作用使其光谱展宽。2.我们证明了近紫外超短脉冲的光谱展宽是由瞬态受激拉曼散射激发的分子的相干旋转运动调制的。我们还提出了利用两种旋转拉曼相干性来填补调制谱凹陷的新方法。3.研制了一种新型的紫外超短光脉冲测量系统，该系统采用激光器作为光源，利用激光器输出的超短光脉冲进行测量 ...更多信息多光子电离/质谱仪作为检测器。这使我们能够成功地测量深紫外飞秒脉冲使用一氧化氮和氙的电离源。这为分析分子在极端超快时间区域的行为提供了可能。4.我们采用紫外飞秒激光作为光源，通过气相色谱/多光子电离/质谱技术实现了对二恶英类化合物的高灵敏检测。这使我们能够检测到五氯化二苯并呋喃，其限度低于0.1 pg。以氘气和甲烷为介质，在多程拉曼池、空芯光子带隙光纤和空芯毛细管波导中，利用受激拉曼散射和相干反斯托克斯拉曼散射有效地产生了三基色激光.本文研究了在一个窄芯光子带隙光纤和一个色散补偿高精细度腔中产生连续受激拉曼散射和四波混频。我们首先证明了相位匹配的连续波四波混频和高效的反斯托克斯辐射的产生在这种方法。少