TUNABLE DIODE-LASER RATIO MEASUREMENTS OF ATMOSPHERIC CONSTITUENTS BY EMPLOYING DUAL FITTING ANALYSIS AND JUMP SCANNING

被引:22
作者
FRIED, A [1 ]
HENRY, B [1 ]
DRUMMOND, JR [1 ]
机构
[1] UNIV TORONTO, DEPT PHYS, TORONTO M5S 1A1, ONTARIO, CANADA
来源
APPLIED OPTICS | 1993年 / 32卷 / 06期
关键词
D O I
10.1364/AO.32.000821
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We present two new approaches in tunable diode laser absorption spectroscopy (TDLAS) for measuring the ratio of two components with high precision. These techniques, dual line fitting analysis and jump scanning, greatly extend the versatility and applicability of TDLAS. Three important applications for these approaches are discussed. In addition, we demonstrate the capability to quantify features that are different in amplitude by a factor of 22.4 with a precision of 0.3%. Such a precision is also achieved for features that are different in amplitude by a factor of 12.9 and separated by 0.2363 cm-1. Both jump scanning and dual line fitting analysis are being used on a routine basis in a laboratory kinetics study to measure simultaneously the concentrations of H2O and NO, whose features are separated by 0.4866 cm-1.
引用
收藏
页码:821 / 827
页数:7
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