scholarly journals Interband cascade laser based mid-infrared methane sensor system using a novel electrical-domain self-adaptive direct laser absorption spectroscopy (SA-DLAS)

2017 ◽  
Vol 25 (25) ◽  
pp. 31876 ◽  
Author(s):  
Fang Song ◽  
Chuantao Zheng ◽  
Wanhong Yan ◽  
Weilin Ye ◽  
Yiding Wang ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Sensor System ◽  
Laser Absorption Spectroscopy ◽  
Mid Infrared ◽  
Methane Sensor ◽  
Laser Absorption ◽  
Interband Cascade Laser ◽  
Direct Laser ◽  
Self Adaptive

scholarly journals Measurement of Atmospheric Dimethyl Sulfide with a Distributed Feedback Interband Cascade Laser

Sensors ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 3216 ◽  
Author(s):  
Shuanke Wang ◽  
Zhenhui Du ◽  
Liming Yuan ◽  
Yiwen Ma ◽  
Xiaoyu Wang ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Dimethyl Sulfide ◽  
Tunable Laser ◽  
Distributed Feedback ◽  
Integration Time ◽  
Laser Absorption Spectroscopy ◽  
Atmospheric Measurements ◽  
Pure Nitrogen ◽  
Laser Absorption ◽  
Interband Cascade Laser

This paper presents a mid-infrared dimethyl sulfide (CH3SCH3, DMS) sensor based on tunable laser absorption spectroscopy with a distributed feedback interband cascade laser to measure DMS in the atmosphere. Different from previous work, in which only DMS was tested and under pure nitrogen conditions, we measured DMS mixed by common air to establish the actual atmospheric measurement environment. Moreover, we used tunable laser absorption spectroscopy with spectral fitting to enable multi-species (i.e., DMS, CH4, and H2O) measurement simultaneously. Meanwhile, we used empirical mode decomposition and greatly reduced the interference of optical fringes and noise. The sensor performances were evaluated with atmospheric mixture in laboratory conditions. The sensor’s measurement uncertainties of DMS, CH4, and H2O were as low as 80 ppb, 20 ppb, and 0.01% with an integration time 1 s, respectively. The sensor possessed a very low detection limit of 9.6 ppb with an integration time of 164 s for DMS, corresponding to an absorbance of 7.4 × 10−6, which showed a good anti-interference ability and stable performance after optical interference removal. We demonstrated that the sensor can be used for DMS measurement, as well as multi-species atmospheric measurements of DMS, H2O, and CH4 simultaneously.

A four-channel-based mid-infrared methane sensor system using novel optical/electrical dual-domain self-adaptive denoising algorithm

2022 ◽  
Vol 149 ◽  
pp. 106797
Author(s):  
Fang Song ◽  
Chuantao Zheng ◽  
Shuo Yang ◽  
Kaiyuan Zheng ◽  
Weilin Ye ◽  
...  
Keyword(s):  
Sensor System ◽  
Mid Infrared ◽  
Methane Sensor ◽  
Dual Domain ◽  
Adaptive Denoising ◽  
Self Adaptive

Electrical-domain self-adaptive mid-infrared laser-based methane sensor system

2018 ◽  
Vol 26 (8) ◽  
pp. 1910-1916
Author(s):  
宋 芳 SONG Fang ◽  
杨 硕 YANG Shuo ◽  
余 迪 YU Di ◽  
周言文 ZHOU Yan-wen ◽  
郑传涛 ZHENG Chuan-tao ◽  
...  
Keyword(s):  
Infrared Laser ◽  
Sensor System ◽  
Mid Infrared ◽  
Methane Sensor ◽  
Self Adaptive

High-precision methane isotopic abundance analysis using near-infrared absorption spectroscopy at 100 Torr

The Analyst ◽  
2021 ◽  
Author(s):  
Zhiwei Liu ◽  
Chuantao Zheng ◽  
Tianyu Zhang ◽  
Yu Zhang ◽  
Yiding Wang ◽  
...  
Keyword(s):  
High Precision ◽  
Absorption Spectroscopy ◽  
Infrared Absorption ◽  
Near Infrared ◽  
Sensor System ◽  
Infrared Absorption Spectroscopy ◽  
Isotopic Abundance ◽  
Laser Absorption Spectroscopy ◽  
Laser Absorption ◽  
Carbon Isotopic

A near-infrared methane (CH4) sensor system for carbon isotopic abundance analysis was developed based on laser absorption spectroscopy (LAS).

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