Development of a picosecond time-resolved Fourier-transform spectrometer

皮秒时间分辨傅立叶变换光谱仪的研制

• 批准号: 11554023
• 负责人: TASUMI Mitsuo
• 金额: $ 3.01万
• 依托单位: Saitama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11554023/
• 关键词: Picosecond time-resolved Raman spectroscopy; Tunable near-infrared light; Fourier-transform Raman spectrometer; Conducting polymers; Fluorescent molecules

A picosecond time-resolved Raman spectrometer was constructed for the purpose of measuring picosecond time-resolved Raman spectra from various fluorescent molecules and conducting polymers.Wavelength-tunable near-infrared light pulses are obtained as the signal output (wavelength region : 1060-1350 nm) from an optical parametric generator/amplifier (OPG/A) excited with the fundamental output from a picosecond Ti-sapphire regenerative amplifier coupled with the output from a mode-locked Er-doped fiber laser. The near-infrared light pulses thus obtained are used as the probe light for measuring the Raman spectra. A step-scan Fourier-transform (FT) Raman spectrometer is employed for measuring the Raman scattering. The Raman scattering is introduced into the step-scan FT Raman spectrometer. The interference signal from the detector is processed with a box-car integrator and an A/D converter to obtain a Raman spectrum.When the second harmonic (wavelength region : 775-870 nm) of the idler output from an OPG/A is used as the probe light, the Raman scattering is analyzed with a dispersive spectrometer equipped with a CCD detector.Transient species are generated by irradiating either the second harmonic (388 nm) or third harmonic (258 nm) of the output from the Ti-sapphire regenerative amplifier as the pump light. The time-resolved Raman spectrum from the transient species is obtained by the probe pulse with a delay time from the pump pulse.

构建了皮秒时间分辨拉曼光谱仪，用于测量各种荧光分子和导电聚合物的皮秒时间分辨拉曼光谱。获得波长可调的近红外光脉冲作为信号输出（波长范围：1060-1350 nm） ）来自光学参量发生器/放大器（OPG/A），由皮秒钛蓝宝石再生放大器的基波输出激励，并与输出耦合来自锁模掺铒光纤激光器。将由此获得的近红外光脉冲用作用于测量拉曼光谱的探测光。采用步进扫描傅里叶变换（FT）拉曼光谱仪来测量拉曼散射。将拉曼散射引入步进扫描FT拉曼光谱仪。来自探测器的干涉信号经过箱车积分器和 A/D 转换器处理以获得拉曼光谱。当使用 OPG/A 闲频输出的二次谐波（波长范围：775-870 nm）时作为探测光，拉曼散射通过配备 CCD 检测器的色散光谱仪进行分析。通过照射二次谐波 (388 nm) 或三次谐波 (258 nm) 产生瞬态物质。 nm) 的钛蓝宝石再生放大器的输出作为泵浦光。瞬态物质的时间分辨拉曼光谱是通过具有泵脉冲延迟时间的探测脉冲获得的。

项目成果

M. Nara, A. Sakamoto, J. Yamamichi, M. Tasumi: "Temperature Dependence of Near-IR Excited Raman Spectra of Crystalline Hen Egg-White Lysozyme"Biopolymers / Biospeciroscopy. (in press). (2001)

M. Nara、A. Sakamoto、J. Yamamichi、M. Tasumi：“结晶鸡蛋清溶菌酶的近红外激发拉曼光谱的温度依赖性”生物聚合物/生物光谱学。

M. Tasumi, A. Sakamoto, T. Hieda, H. Torii: "Group Theory and Effects of Symmetry Lowering on Vibrational Spectra"J. M. Chalmers and P. R. Griffiths, eds., Handbook of Vibrational Spectroscopy, John Wiley & Sons, Inc.. (in press). (2001)

M. Tasumi、A. Sakamoto、T. Hieda、H. Torii：“群论和对称性降低对振动谱的影响”J。

Akira Sakamoto ら: "Picosecond Time-Resolved Infrared Absorption Studies on the Photoexcited States of Poly(p-phenylenevinylene)"J.Phys.Chem.A. 104. 4198-4202 (2000)

Akira Sakamoto 等人：“聚对亚苯基亚乙烯基光激发态的皮秒时间分辨红外吸收研究”J.Phys.Chem.A. 104. 4198-4202 (2000)

Akira Sakamoto: "Picosecond Time-Resolved Infrared Absorption Studies on the Photoexcited States of Poly(p-phenylenevinylene)"J. Phys. Chem. A. 104. 4187-4202 (2000)

Akira Sakamoto：“聚（对亚苯基亚乙烯基）光激发态的皮秒时间分辨红外吸收研究”J。

Akira Sakamoto ら: "Picosecond Time-Resolved Infrared Absorption Studies on the Photoexcited States of Poly(p-phenylenevinylene)"J. Phys. Chem. A. (印刷中). (2000)

Akira Sakamoto 等人：“聚（对亚苯基亚乙烯基）光激发态的皮秒时间分辨红外吸收研究”J. Phys A.（出版中）。