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Absorption Line Intensity and Profile Studied by Fourier Transform Intra-cavity Laser Absorption Spectroscopy
Wu Zhiyong, Cheng Guosheng, Wang Le, Liu Anwen, Hao Luyuan, Hu Shuiming*
Laboratory of Bond-Selective Chemistry, University of Science and Technology of China, Hefei 230026
Abstract:
Based on Fourier-transform intra-cavity laser absorption spectroscopy (FT-ICLAS) setup reported, a signal differential module is introduced to reduce the noise rising from the fluctuation of the laser power and to improve the quality of the interferogram obtained in the experiment. The capability to do quantitative measurement was demonstrated by recording the atmospheric oxygen absorption near 760 nm. The v=6 local mode stretching overtone spectra of phosphine were recorded with different sample pressure. The pressure caused self-broadening and line shift parameters of this band were achieved.
Key words:  Absorption spectroscopy, Spectral line profile, Line intensity, Intra-cavity laser absorption, Phosphine
FundProject:
傅立叶变换激光腔内吸收光谱方法研究吸收谱线的强度与线形
吴志永, 成国胜, 王乐, 刘安雯, 郝绿原, 胡水明*
中国科学技术大学,中国科学院选键化学重点实验室,合肥,230026
摘要:
在原有傅立叶变换激光腔内吸收光谱实验装置的基础上,利用信号差分方法减少了光强波动对实验干涉谱图的影响,改善了信噪比.通过对大气中氧气在760 nm处的吸收谱线的绝对强度测量,验证了该方法的定量测量能力.在不同压力条件下对磷烷v=6伸缩局域模泛频吸收谱带进行了测量,获得了其谱线的自压力加宽和自压力线移参数.
关键词:  吸收光谱  谱线线形  谱线强度  激光腔内吸收  磷烷
DOI:10.1088/1674-0068/18/3/313-318
分类号: