OPTOACOUSTIC DETECTION USING STARK MODULATION

被引：16
作者：
KAVAYA, MJ
MARGOLIS, JS
SHUMATE, MS
机构：
[1] California Institute of Technology, Jet Propulsion Laboratory, Pasadena, CA
来源：
APPLIED OPTICS | 1979年 / 18卷 / 15期
关键词：
D O I：
10.1364/AO.18.002602
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Stark modulation of the absorbed laser radiation in an optoacoustic detector (or spectrophone) is reported. Measurements were made over a range of total pressure between 760 Torr and 50 Torr. Greatly enhanced molecular discrimination is suggested due to the tuning ability of the Stark-shifted absorption. The background signal obtained by operating in this mode is more than 500 times smaller than that obtained by operating the same optoacoustic detector in the conventional chopped radiation mode. The responsivity of the optoacoustic detector and the absorption coefficient of C2H4 are presented as a function of total pressure. © 1979 Optical Society of America.
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页码：2602 / 2606
页数：5
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