Open AccessStand-off detection of ethanol vapor based on a tunable ICL
Author(s) -
Hui Gao,
Hui Wang,
Banghong Zhang,
Liang Xie,
Ping Gong,
Bin Yuan,
Baokan Qi
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.021433
Subject(s) - optics , water vapor , detector , interference (communication) , wavelength , materials science , signal (programming language) , absorption (acoustics) , detection theory , laser , physics , telecommunications , computer science , channel (broadcasting) , meteorology , programming language
We demonstrate a method based on an ICL with tunable wavelength covering ethanol absorption peak, water absorption peak and a reference point around 3.345um to make a stand-off detection of ethanol vapor in the space. The detection model is established using the ratios of reference signal and detection signal at three target wavelengths, which help to eliminate the influence of laser power and the cross interference from water vapor in the space. The intrinsic error caused by detectors and optical elements have been corrected, and availability of this approach has been proved both in theory and in experiment.