Journal Article10.1007/S00340-007-2846-9
Application of quantum cascade lasers to trace gas analysis
Anatoliy A. Kosterev,Gerard Wysocki,Y.A. Bakhirkin,Stephen So,Rafal Lewicki,Matthew P. Fraser,Frank K. Tittel,Robert F. Curl +7 more
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TL;DR: In this paper, the authors explored the use of several methods for carrying out absorption spectroscopy with mid-infrared quantum cascade sources, which include multipass absorption spectrography, cavity ring down spectrograms (CRDS), ICOS, and quartz-enhanced photoacoustic spectrogram (QEPAS).
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Abstract: Quantum cascade (QC) lasers are virtually ideal mid-infrared sources for trace gas monitoring. They can be fabricated to operate at any of a very wide range of wavelengths from ∼ 3 μm to ∼ 24 μm. Seizing the opportunity presented by mid-infrared QC lasers, several groups world-wide are actively applying them to trace gas sensing. Real world applications include environmental monitoring, industrial process control and biomedical diagnostics. In our laboratory we have explored the use of several methods for carrying out absorption spectroscopy with these sources, which include multipass absorption spectroscopy, cavity ring down spectroscopy (CRDS), integrated cavity output spectroscopy (ICOS), and quartz-enhanced photoacoustic spectroscopy (QEPAS).
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Citations
Experimental-based comparison between off-axis integrated cavity output spectroscopy and multipass-assisted wavelength modulation spectroscopy at 7.7 mu m
Faisal Nadeem,Julien Mandon,Simona M. Cristescu,Amir Khodabakhsh,Frans J. M. Harren +4 more
- 15 Sep 2019
TL;DR: In this paper, a mid-infrared trace gas detection system based on off-axis integrated cavity output spectroscopy (OA-ICOS) is demonstrated for accurate and sensitive detection of N2O in combination with a continuous wave external-cavity quantum cascade laser (EC-QCL) working around 7.7 µm.
Terahertz Wave Absorption Spectroscopy of Gases
Ingrid Wilke
TL;DR: Terahertz wave spectroscopy is a powerful method for trace gas analysis. It is based on the absorption of terahertz waves by gas molecules. The absorption spectra provide selective identification of polar gas molecules through their characteristic rotational spectra.
Etching Processing of InGaAs/InAlAs Quantum Cascade Laser
Qi Wu,Yana Zhu,Dongxin Xu,Zaijin Li,Yi Qu,Zhongliang Qiao,Guojun Liu,Zhibin Zhao,Lina Zeng,Hao Chen,Lin Li +10 more
TL;DR: Researchers developed a wet etching process for InGaAs/InAlAs quantum cascade lasers, achieving a 0.6 μm/min etching rate with a HBr:HNO3:H2O ratio of 1:1:10, and fabricated a continuous-wave operating laser at 20 °C with 186 mW output power.
Semiconductor Laser Based Photoacoustic Spectroscopy Gas Detection Methods and Developments
ZHANG Xiao-jun,ZHANG Yong-gang +1 more
TL;DR: This study reviews semiconductor laser-based photoacoustic spectroscopy (PAS) gas detection methods, focusing on mid-infrared semiconductor laser developments, acoustic signal detection improvements, and predicting the technique's prospects for gas detection applications.
References
Solid-state mid-infrared laser sources
Irina T. Sorokina,Konstantin L. Vodopyanov +1 more
- 01 Jan 2003
TL;DR: In this paper, high performance Quantum Cascade Lasers and their applications are discussed. But they are not suitable for use in medical applications, as shown in Figure 1 : The application of mid-IR 2-5?m Heterojunction Laser Diodes.
696
Quartz-enhanced photoacoustic spectroscopy
TL;DR: In this article, the authors described a method and apparatus for detecting photoacoustic signals in fluid media by using piezoelectric crystal quartz, which is preferably in the shape of a tuning fork.
548
Applications of quartz tuning forks in spectroscopic gas sensing
Anatoliy A. Kosterev,Frank K. Tittel,Dmitry V. Serebryakov,Alexander L. Malinovsky,Igor V. Morozov +4 more
TL;DR: In this paper, a recently introduced approach to photoacoustic detection of trace gases utilizing a quartz tuning fork (TF) as a resonant acoustic transducer is described in detail.
435
Chemical sensors based on quantum cascade lasers
TL;DR: In this paper, the authors have used pulsed and CW quantum cascade distributed feedback (QC-DFB) laser sources as mid-infrared spectroscopic sources for gas detection.
415
Current status of clinical breath analysis
Terence H. Risby,S.F. Solga +1 more
TL;DR: The present status of clinical breath analysis is discussed and reasons why breath analysis has not received similar widespread clinical use are suggested and the availability of real-time, portable monitors will represent a breakthrough for clinical diagnosis.
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