Ultra-short pulse generation and its interaction with matter

超短脉冲的产生及其与物质的相互作用

• 批准号: 14002003
• 负责人: KOBAYASHI Takayoshi
• 金额: $ 128.13万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Specially Promoted Research
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14002003/
• 关键词: Non-collinear optical parametric amplification (NOPA); Carrier envelope phase (CEP); Absolute phase; Visible-infrared region; Transient-state spectroscopy; Real-time vibrational spectroscopy; Photonic crystal fiber; Quantum interference control; キ

(1) Generation of ultra-short pulse: Carrier envelope phase (CEP) selfstabilization of the NOPA output pulse was evaluated with the photonic crystal fiber, and its stability was confirmed. inter-stabilization of outputs of two NOPA systems was also evaluated by means of spectral interference. Anew spectroscopy system for pump-probe measurement with two NOPA systems was constructed.(2) Development of ultra-short pulse characterization method: CEP of the ultra-short pulse was measured. Conventional method of CEP measurement is limited on the use of extremely intense laser field. A newly developed method has enabled us to measure the CEP of pulse with arbitrary intensity. Ultra-short pulse with a fixed CEP was generated by means of OPA, and fluctuation was stabilized successfully asmuch as π/10. Using the CEP-controlled laser system, a CEP optical poling experiment was established. Induced molecular orientation was shown to be controlled by the CEP, which was consistent with theoretical prediction.(3) Transient-state spectroscopy (Real-time spectroscopy of molecular vibration): Real-time dynamics of vibronic coupling of molecular system, such as polydiacetylene, one-dimensional system of conjugated polyene, isocyanine J-aggregate, phthalocyanine, porphyrin and its metallic compound, was established.

(1)超短脉冲的产生：利用光子晶体光纤对NOPA输出脉冲的载波包络相位(CEP)自稳定进行了评价，并对其稳定性进行了验证。用光谱干扰法对两个NOPA系统的输出间稳定性进行了评估。利用两个NOPA系统构建了一种新型的泵浦-探测光谱测量系统。(2)超短脉冲表征方法的发展：测量了超短脉冲的CEP。传统的CEP测量方法仅限于使用极强的激光场。一种新发展的方法使我们能够测量任意强度的脉冲的CEP。利用光学功率放大器产生了固定CEP的超短脉冲，并成功地稳定了与π/10一样的起伏。利用CEP控制的激光系统，建立了CEP光学极化实验。暂态光谱(实时分子振动光谱)：建立了聚二乙炔、一维共轭多烯体系、异菁J聚集体、酞菁、卟啉及其金属化合物等分子体系的振动耦合实时动力学模型。

项目成果

A.Baltuska, T.Fuji, T.Kobayashi: "Visible pulse compression to 4 fs by optical parametric amplification and programmable dispersion contro"Opt.Lett.. 27. 306-308 (2002)

A.Baltuska、T.Fuji、T.Kobayashi：“通过光学参量放大和可编程色散控制将可见光脉冲压缩至 4 fs”Opt.Lett.. 27. 306-308 (2002)

Phase analysis of vibrational wavepackets in the ground and the excited states in polydiacetylene

地面振动波包和聚丁二炔激发态的相位分析

• 发表时间: 2004
• 期刊: Phy.Rev.B 70・21
• 作者: M.Ikuta;Y.Yuasa;T.Kimura;H.Matsuda;T.Kobayashi
• 通讯作者: T.Kobayashi

K Yanagi, T.Kobayashi, Hashimoto: "Origin of transition dipole-moment polarizability and hyperpolarizability in hydrazones"Phys.Rev.B. 67. 115122 (2003)

K Yanagi、T.Kobayashi、Hashimoto：“腙中过渡偶极矩极化率和超极化率的起源”Phys.Rev.B。

A.Baltuska, T.Kobayashi: "Adaptive shaping of two-cycle visible pulses using a flexible mirror"Appl.Phys.B. 75. 427-443 (2003)

A.Baltuska、T.Kobayashi：“使用柔性镜对两周期可见脉冲进行自适应整形”Appl.Phys.B。

P.Kumbhakar, T.Kobayashi: "Ultra-broadband phase-matching in two recently grown nonlinear optical crystals for generation of tunable ultrafast laser radiation by type - I noncollinear optical parametric amplification"J.Appl.Phys.. in press. (2004)

P.Kumbhakar、T.Kobayashi：“两个最近生长的非线性光学晶体中的超宽带相位匹配，用于通过 I 型非共线光学参量放大产生可调谐超快激光辐射”J.Appl.Phys.. 正在出版。