Oxygen sensing using single frequency GaAs-AlGaAs DFB laser diodes and VCSELs

被引：23
作者：
Weldon, V
OGorman, J
PerezCamacho, JJ
Hegarty, J
机构：
[1] Optronics Ireland, Physics Department, Trinity College
来源：
ELECTRONICS LETTERS | 1996年 / 32卷 / 03期
关键词：
gas sensors; semiconductor junction lasers;
D O I：
10.1049/el:19960169
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Oxygen detection using a GaAs-AlGaAs distributed feedback laser diode emitting at a wavelength of 761 nm is demonstrated for the first lime. Using wavelength modulation spectroscopy with harmonic detection the authors have achieved a detection limit of 20 ppm.m with a lock-in amplifier time constant of 33.3 ms. The first results comparing the relative merits of VCSELs and DFB laser diodes for sensing applications are also shown.
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收藏
页码：219 / 221
页数：3
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