Highly sensitive detection of methane by near-infrared laser absorption spectroscopy using a compact dense-pattern multipass cell
TL;DR: In this article, high-sensitive detection of atmospheric methane (CH4) was performed by long optical pathlength absorption spectroscopy based on a novel compact dense-pattern multipass cell (DP-MPC) in conjunction with a fiber-coupled distributed feedback diode laser operating at 1.653μm.
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Abstract: Highly sensitive detection of atmospheric methane (CH4) was performed by long optical pathlength absorption spectroscopy based on a novel compact dense-pattern multipass cell (DP-MPC) in conjunction with a fiber-coupled distributed feedback diode laser operating at 1.653 μm. Wavelength modulation spectroscopy approach was used and a minimum detectable concentration (1σ) of 100 ppb was obtained with a lock-in time constant of 1 ms. A measurement precision of
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Compact TDLAS based sensor design using interband cascade lasers for mid-IR trace gas sensing.
Lei Dong,Frank K. Tittel,Chunguang Li,Nancy P. Sanchez,Hongpeng Wu,Chuantao Zheng,Yajun Yu,Angelo Sampaolo,Robert J. Griffin +8 more
TL;DR: Two compactTDLAS sensor systems based on different structural optical cores were developed to create compact TDLAS based sensors for the mid-IR gas detection with high detection sensitivity and low power consumption.
194
Mid-Infrared Tunable Laser-Based Broadband Fingerprint Absorption Spectroscopy for Trace Gas Sensing: A Review
TL;DR: In this article, the authors reviewed mid-infrared tunable laser-based broadband absorption spectroscopy for trace gas detection, focusing on 2008-2018, and discussed recent developments of system configuration, tunable lasers, detectors, broadband spectroscopic techniques, and their applications for sensitive, selective, and quantitative trace gases detection.
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Atmospheric CH4 measurement near a landfill using an ICL-based QEPAS sensor with V-T relaxation self-calibration
Hongpeng Wu,Lei Dong,Xukun Yin,Angelo Sampaolo,Pietro Patimisco,Weiguang Ma,Lei Zhang,Wangbao Yin,Liantuan Xiao,Vincenzo Spagnolo,Vincenzo Spagnolo,Suotang Jia +11 more
TL;DR: In this paper, a quartz-enhanced photoacoustic spectroscopy methane (CH4) sensor with vibrational to translational (V-T) relaxation self-calibration was realized and tested for atmospheric CH4 detection near a landfill.
146
A portable sensor for in-situ measurement of ammonia based on near-infrared laser absorption spectroscopy
Xinqian Guo,Fei Zheng,Chuanliang Li,Xiaofei Yang,Ning Li,Shuping Liu,Jilin Wei,Xuanbing Qiu,Qiusheng He,Qiusheng He +9 more
TL;DR: In this paper, a portable laser sensor for trace ammonia (NH3) is developed based on near-infrared laser absorption spectroscopy, which is implemented by a system-on-chip based on field-programmable gate array.
121
Simultaneous detection of atmospheric CO and CH4 based on TDLAS using a single 2.3 μm DFB laser.
Ligang Shao,Bo Fang,Fei Zheng,Xuanbing Qiu,Qiusheng He,Jilin Wei,Chuanliang Li,Chuanliang Li,Weixiong Zhao +8 more
TL;DR: A laser-based spectrometer with a physical size of 60× 30 ×25 cm3 has been developed to continuously monitor CO and CH4 in atmosphere based on tunable diode laser absorption spectroscopy (TDLAS) and has been validated through real-time and in-situ measurement of atmospheric CO andCH4 for 48 h.
114
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