%0 Journal Article
%T Influence of laser intensity in second-harmonic detection with tunable diode laser multi-pass absorption spectroscopy
%A Kan Rui-Feng
%A Dong Feng-Zhong
%A Zhang Yu-Jun
%A Liu Jian-Guo
%A Liu Cheng
%A Wang Min
%A Gao Shan-Hu
%A Chen Jun
%A <br>阚瑞峰
%A 董凤忠
%A 张玉钧
%A 刘建国
%A 刘诚
%A 王敏
%A 高山虎
%A 陈军
%J 中国物理 B
%D 2005
%I 
%X Tunable diode laser absorption spectroscopy (TDLAS) has been widely employed in atmospheric trace gases detection. The ratio of the second-harmonic signal to the intensity of laser beam incident to the multi-pass cell is proved to be proportional to the product of the path length and the gas concentration under any condition. A new calibration method based on this relation in TDLAS system for the measurement of trace gas concentration is proposed for the first time. The detection limit and the sensitivity of the system are below 110 and 31ppbv (parts-per-billion in volume), respectively.
%K tunable diode laser absorption spectroscopy
%K multi-pass cell
%K harmonic detection
%K wave-length modulation<br>可调二极管
%K 激光技术
%K 吸收光谱
%K 谐函数
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=CD8D6A6897B9334F09D8D1648C376FB4&aid=F35F6343E5B33F108BDCCA377F751C01&yid=2DD7160C83D0ACED&vid=F3583C8E78166B9E&iid=9CF7A0430CBB2DFD&sid=2CCF18D0FC32D483&eid=A9446C2BAF45F2AA&journal_id=1009-1963&journal_name=中国物理&referenced_num=3&reference_num=8