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

基本信息

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

项目摘要

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.

构建了一秒钟的时间分解的拉曼光谱仪，目的是为了测量各种荧光分子和导电聚合物的时间分布的时间分解的拉曼光谱。可从信号输出中获得的 - 可通过激发型（1060-1350 nm/am amp）的发射（OP）输出（op op aptife op formitife op formitife op），可从各种荧光分子和导电聚合物中测量近红外光脉冲。 Picsecond Ti-Sapphire再生放大器与模式锁定的ER掺杂纤维激光器的输出相结合。这样获得的近红外脉冲用作测量拉曼光谱的探针光。采用步扫傅里叶转变（FT）拉曼光谱仪用于测量拉曼散射。拉曼散射被引入阶梯扫描FT拉曼光谱仪中。使用盒车积分器和A/D转换器处理来自检测器的干扰信号以获得拉曼频谱。当使用OPG/A输出的第二个谐波区域（波长区域：775-870 nm）用作探针光的探针散射，将两次分析的分析分析用于分配频谱的探针散射。 Ti-Sapphire再生放大器的谐波（388 nm）或第三个谐波（258 nm）作为泵光。瞬态物种的时间分辨拉曼光谱是通过探针脉冲从泵脉冲的延迟时间获得的。