SENSITIVE AMPLITUDE-MODULATED AND PHASE-MODULATED ABSORPTION-SPECTROSCOPY WITH A CONTINUOUSLY TUNABLE DIODE-LASER

被引：18

作者：

GROSSKLOSS, R

KERSTEN, P

DEMTRODER, W

机构：

[1] Fachbereich Physik, Universität Kaiserslautern, Kaiserslautern

来源：

APPLIED PHYSICS B-LASERS AND OPTICS | 1994年 / 58卷 / 02期

关键词：

07.65; 33; 42.80;

D O I：

10.1007/BF01082348

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The output beam of a continuously tunable GaAlAs-diode laser with external cavity is phase-modulated at 800 MHz in an electrooptic LiTaO3 crystal. The amplitude of the rf voltage applied to the EOM is modulated at 80 kHz in order to allow lock-in detection. Using a multipass absorption cell the detection limit of the absorption coefficient a could be pushed down to alpha(min) greater-than-or-equal-to 2 x 10(-10) cm-1. The sensitivity of the techique is demonstrated by examples of overtone transitions in C2H2 and H2O vapor.

引用

页码：137 / 142

页数：6

共 17 条

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