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Photoacoustic Raman Spectroscopy with Two Counterprapagating Laser Beams
Yu Yuanqin,Wang Hua,Shi Yong,Li Qifeng,Dai Jinghua,Liu Shilin*,Ma Xingxiao
Author NameAffiliationE-mail
Yu Yuanqin Laboratory of Bond Selective ChemistryDepartment of Chemical PhysicsUniversity of Science and Technology of ChinaHefei 230026  
Wang Hua Laboratory of Bond Selective ChemistryDepartment of Chemical PhysicsUniversity of Science and Technology of ChinaHefei 230026  
Shi Yong Laboratory of Bond Selective ChemistryDepartment of Chemical PhysicsUniversity of Science and Technology of ChinaHefei 230026  
Li Qifeng Laboratory of Bond Selective ChemistryDepartment of Chemical PhysicsUniversity of Science and Technology of ChinaHefei 230026  
Dai Jinghua Laboratory of Bond Selective ChemistryDepartment of Chemical PhysicsUniversity of Science and Technology of ChinaHefei 230026  
Liu Shilin* Laboratory of Bond Selective ChemistryDepartment of Chemical PhysicsUniversity of Science and Technology of ChinaHefei 230026 slliu@ustc.edu.cn 
Ma Xingxiao Laboratory of Bond Selective ChemistryDepartment of Chemical PhysicsUniversity of Science and Technology of ChinaHefei 230026  
Abstract:
An improved experiment setup for Stimulated Photoacoustic Raman Spectroscopy(PARS)was reported. The employed two laser beams,unlike general arrangement of propagating in the same direction,counterpropagated with each other. This arrangement can eliminate the limitation that the small Raman shift could not be measured with general arrangement. Therefore,this improved setup was especially useful for measuring the PARS spectrum with small Raman shift,such as the pure rotational Raman spectrum. In the experiment,taking CH4 molecules as a research object,one laser was fixed at 532. 1 nm while another tunable dye laser scanned. The PARS spectrum of CH4 molecules for the v1 ,v2 and v3 bands was recorded in the two wavelength ranges of 625-642 nm and 573-589 nm,and the results agreed well with those obtained by Spontaneous Raman Scattering(ORS)technique,confirming the validity of the improved experimental setup.
Key words:  PARS,Improved setup,CH4
FundProject:
反向泵浦的受激喇曼光声光谱
喻远琴,汪华,石勇,李奇峰,戴静华,刘世林*,马兴孝
摘要:
报道一种改进的受激喇曼光声光谱实验方法(Photoacoustic Raman Spectroscopy, PARS),该方法的主要特点是将两束激光以反向传播的方式重合,从而不仅克服了通常的实验方法(两束激光通过双色镜片重合)在测量小喇曼位移方面的限制,也使实验的操作更加简单.在实验中,以CH4分子为研究对象,一束波长为532.1 nm的激光作为泵浦光,另一束可调谐激光作为探测光(Stokes光),两束光相向作用于光声池内,在625~642 nm和573~589 nm得到了CH4分子ν1、ν2和ν3模的P
关键词:  受激喇曼光声光谱  反向泵浦  CH4
DOI:10.1088/1674-0068/17/4/385-389
分类号: