MEASUREMENT OF MOLECULAR CONCENTRATIONS AND LINE PARAMETERS USING LINE-LOCKED 2ND HARMONIC SPECTROSCOPY WITH AN ALGAAS DIODE-LASER

被引：30
|
作者：
GOLDSTEIN, N
ADLERGOLDEN, S
LEE, J
BIEN, F
机构：
[1] Spectral Sciences Inc., Burlington, MA, 01803-5169
来源：
APPLIED OPTICS | 1992年 / 31卷 / 18期
关键词：
DIODE; LASER; SPECTROSCOPY; WATER; HUMIDITY; MONITOR; LINEWIDTH; LINE STRENGTH;
D O I：
10.1364/AO.31.003409
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The technique of line-locked wavelength modulation with 2f detection is applied to the measurement of water vapor concentration and absorption line parameters by using an 820-nm AlGaAs communications diode laser. Measurements of the 2f signal as a function of the modulation amplitude yield accurate concentrations and line parameters over a pressure range of an order of magnitude and half-widths from 0.02 to 0.15 cm-1. Using two different spectral lines, we determined concentrations and line parameters with 1% precision, and the absolute accuracy of the line parameters is 3% or better. The results have been used to calculate calibration curves for a diode laser humidity monitor.
引用
收藏
页码：3409 / 3415
页数：7
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