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Generation of Multi-Color Ultimately-short Optical Pulse and Its Application to the-State-of-the-Art Modern Technology

多色终极短光脉冲的产生及其在最先进现代技术中的应用

基本信息

批准号：
13853006
负责人：
IMASAKA Totaro
金额：
$ 72.05万
依托单位：
KYUSHU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (S)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2004
项目状态：
已结题

项目摘要

1.Verification of Phase-Locking in the Process of Two-Color Stimulated Raman ScatteringWe observed four rotational Raman lines using a 100-fs laser pulse as an input beam. The output beam had a duration of 30 fs, indicating that the phases are locked each other among those Raman limes. In, addition, we demonstrated another approach for pulse compression of a near-ultraviolet femtosecond pulse by probing coherent molecular motion in the process of transient stimulated Raman scattering induced by a near-infrared femtosecond laser.2.Generation of a Train of Highly-Repetitive Ultrashort PulsesWe observed continuous-wave (CW) high-order rotational Raman lines from ortho-hydrogen using a pressurized high-finesse optical resonator pumped by a CW Ti : Sapphire laser with an output power of 200 mW. We measured the temporal profile of the output beam using a laboratory-made autocorrelator, which is based on two-photon absorption of an electrode in a photomultiplier tube, showing a beat waveform … More consisting of sinusoidal modulation at a frequency of 17 THz. To our knowledge, this is the fastest light-intensity modulator. For this reason, we named it "molecular optic-modulator".3.Generation of a High-Peak-Power Ultrashort Optical PulseWe demonstrated the generation of a 17-fs optical pulse using two cells sequentially-aligned. We also showed that deuterium cooled by liquid nitrogen was useful as a Raman medium for a high-power pump pulse with a duration large than 100 fs.4.Application of Multi-Color Ultrashort Laser to Education and ResearchIn the design curriculum for students in a freshman course, we conducted a practical training for the students to fabricate the multi-color laser display using a rainbow-color laser, referred to as "Rainbow Stars." In addition, we made a contract with a company to provide the patent and to commercialize this multi-color laser system. For scientific application, we examined X-ray spectroscopy and trace analysis of dioxin compounds in the environment based on multiphoton ionization/mass spectrometry (MPI/MS). We reported that this approach (MPI/MS) had a comparable detection limit (〜0.6 pg) to that determined by JIS. Less

1.双色受激拉曼散射过程中锁相的验证我们用100 fs的激光脉冲作为输入光束，观察到四条转动的拉曼线。输出光束具有30 fs的持续时间，表明在这些拉曼时间中相位彼此锁定。另外，我们利用近红外飞秒激光诱导的瞬态受激拉曼散射过程中的相干分子运动来实现近紫外飞秒脉冲的压缩。2.高重复率超短脉冲串的产生我们利用高压脉冲发生器观察到了正氢原子的连续波高阶转动拉曼谱线。采用连续Ti：Sapphire激光器泵浦的精细光学谐振腔，输出功率为200 mW。我们用实验室自制的自相关器测量了输出光束的时间轮廓，它是基于光电倍增管中电极的双光子吸收，显示出拍频波形 ...更多信息由频率为17 THz的正弦调制组成。据我们所知，这是最快的光强度调制器。因此，我们将其命名为“分子光调制器”。3.高峰值功率超短光脉冲的产生我们演示了使用两个顺序排列的单元产生17-fs的光脉冲。我们还证明了液氮冷却的氘作为拉曼介质对于持续时间大于100 fs的高功率泵浦脉冲是有用的。4.多色超短激光器在教育和研究中的应用在一年级学生的课程设计中，我们对学生进行了一次使用彩虹色激光器制作多色激光显示器的实践训练，简称“彩虹星”。“此外，我们与一家公司签订了合同，提供专利并将这种多色激光系统商业化。为了科学应用，我们研究了X射线光谱和痕量分析二恶英化合物在环境中的多光子电离/质谱（MPI/MS）的基础上。我们报告说，这种方法（MPI/MS）具有相当的检测限（10.6 pg），由JIS确定。少