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

页码：3409 / 3415

页数：7

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