Trace gas detection with CW cavity ring-down laser absorption spectroscopy

2002 ◽  
Author(s):  
Wen-Bin Yan ◽  
J. Dudek ◽  
K. Lehmann ◽  
P. Rabinowitz
Keyword(s):  
Absorption Spectroscopy ◽  
Gas Detection ◽  
Trace Gas ◽  
Laser Absorption Spectroscopy ◽  
Trace Gas Detection ◽  
Laser Absorption ◽  
Cavity Ring Down

Optimization of Harmonic Detection System for Tunable Diode Laser Absorption Spectroscopy Based on Mathematical Algorithm

2018 ◽  
Vol 13 (10) ◽  
pp. 1533-1542 ◽  
Author(s):  
Danni Shen ◽  
Anji Yu
Keyword(s):  
Diode Laser ◽  
Absorption Spectroscopy ◽  
Detection System ◽  
Rapid Development ◽  
Noise Removal ◽  
Tunable Diode Laser ◽  
Gas Detection ◽  
Laser Absorption Spectroscopy ◽  
Laser Absorption ◽  
Diode Laser Absorption

Traditional gas detection technology has a certain degree of defects in all aspects, and it has not been able to adapt to the rapid development trend. Tunable diode laser absorption spectroscopy (TDLAS) technology has some good performance and is gradually being used in various industries. First, a gas detection instrument is designed. Then, based on subsequent data processing techniques, a wavelet transform algorithm is proposed, and the noise removal and baseline correction functions of the detection system are implemented. The results show that the proposed method has good removal effect on the inherent noise of the system and high efficiency. During the selection of the absorption line, the selected line of some gases cannot avoid the interference of adjacent peaks. Therefore, a mathematical analysis method of differential fold back algorithm is proposed. The absorption peak shape is squeezed by the method of adjacent phase subtraction and displacement superposition. The problem is solved well, and the accuracy of concentration measurement of some gases is effectively improved.

New perspectives in ultrasensitive trace gas monitoring by cavity-enhanced laser absorption spectroscopy

1999 ◽  
Author(s):  
Alexander A. Kachanov ◽  
Daniele Romanini ◽  
Marc Chenevier ◽  
A. Garnache ◽  
Frederic Stoeckel
Keyword(s):  
Absorption Spectroscopy ◽  
Trace Gas ◽  
Laser Absorption Spectroscopy ◽  
Gas Monitoring ◽  
Laser Absorption

scholarly journals Mid-Infrared Tunable Laser-Based Broadband Fingerprint Absorption Spectroscopy for Trace Gas Sensing: A Review

2019 ◽  
Vol 9 (2) ◽  
pp. 338 ◽  
Author(s):  
Zhenhui Du ◽  
Shuai Zhang ◽  
Jinyi Li ◽  
Nan Gao ◽  
Kebin Tong
Keyword(s):  
Absorption Spectroscopy ◽  
Gas Sensing ◽  
Tunable Laser ◽  
Gas Detection ◽  
Trace Gas ◽  
Spectroscopic Techniques ◽  
Trace Gas Detection ◽  
Absorption Bands ◽  
Mid Infrared ◽  
Broadband Absorption

The vast majority of gaseous chemical substances exhibit fundamental rovibrational absorption bands in the mid-infrared spectral region (2.5–25 μm), and the absorption of light by these fundamental bands provides a nearly universal means for their detection. A main feature of optical techniques is the non-intrusive in situ detection of trace gases. We reviewed primarily mid-infrared tunable laser-based broadband absorption spectroscopy for trace gas detection, focusing on 2008–2018. The scope of this paper is to discuss recent developments of system configuration, tunable lasers, detectors, broadband spectroscopic techniques, and their applications for sensitive, selective, and quantitative trace gas detection.

Cavity ring-down laser absorption spectroscopy of IrC

2004 ◽  
Vol 385 (3-4) ◽  
pp. 259-262 ◽  
Author(s):  
Tongmei Ma ◽  
J.W.-H Leung ◽  
A.S.-C Cheung
Keyword(s):  
Absorption Spectroscopy ◽  
Laser Absorption Spectroscopy ◽  
Laser Absorption ◽  
Cavity Ring Down

Cavity ring-down laser absorption spectroscopy of YBr and YI

2012 ◽  
Vol 111 (1) ◽  
pp. 111-117
Author(s):  
Tongmei Ma ◽  
Ling Li ◽  
J.W.H. Leung ◽  
A.S.C. Cheung
Keyword(s):  
Absorption Spectroscopy ◽  
Laser Absorption Spectroscopy ◽  
Laser Absorption ◽  
Cavity Ring Down
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