Application of quantum cascade lasers to trace gas detection

Bielecki, Z.; Stacewicz, T.; Wojtas, J.; Mikołajczyk, J.

doi:10.1515/bpasts-2015-0059

Cited by 25 publications

(16 citation statements)

References 34 publications

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“…10.6 µm Ammonia detection in exhaled breath [67] QCL-quantum cascade laser, PAS-photoacoustic spectroscopy, CRDS-cavity ring down spectroscopy, QEPAS-quartz-enhanced photoacoustic spectroscopy, WMS-wavelength modulation spectroscopy, R-reflectivity of mirrors, L-optical cavity length, EC-external cavity, p-pressure. Other methods of gas detection were described in our earlier studies [68,69]. The microphone output signal is recorded using a low-noise preamplifier and a lock-in voltmeter.…”

Section: Optical Methodsmentioning

confidence: 99%

Ammonia Gas Sensors: Comparison of Solid-State and Optical Methods

et al. 2020

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High precision and fast measurement of gas concentrations is important for both understanding and monitoring various phenomena, from industrial and environmental to medical and scientific applications. This article deals with the recent progress in ammonia detection using in-situ solid-state and optical methods. Due to the continuous progress in material engineering and optoelectronic technologies, these methods are among the most perceptive because of their advantages in a specific application. We present the basics of each technique, their performance limits, and the possibility of further development. The practical implementations of representative examples are described in detail. Finally, we present a performance comparison of selected practical application, accumulating data reported over the preceding decade, and conclude from this comparison.

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Section: Optical Methodsmentioning

confidence: 99%

Ammonia Gas Sensors: Comparison of Solid-State and Optical Methods

et al. 2020

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“…Application of high sensitivity gas sensors is widespread in the gas diagnosis, for instance to evaluate different noxious species, to detect various biomarkers in breath or to search trace amounts of explosives [4]. Detecting methods are dominated by mass spectrometry, chromatography, catalytic sensors, thermal conductivity sensors, semiconductor sensors, electrochemical devices or acoustic sensors [5].…”

Section: Different Gas Sensor Technologiesmentioning

confidence: 99%

Detection of Gaseous Compounds with Different Techniques

Mikołajczyk

Bielecki

Stacewicz

et al. 2016

Metrology and Measurement Systems

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Sensing technology has been developed for detection of gases in some environmental, industrial, medical, and scientific applications. The main tasks of these works is to enhance performance of gas sensors taking into account their different applicability and scenarios of operation. This paper presents the descriptions, comparison and recent progress in some existing gas sensing technologies. Detailed introduction to optical sensing methods is presented. In a general way, other kinds of various sensors, such as catalytic, thermal conductivity, electrochemical, semiconductor and surface acoustic wave ones, are also presented. Furthermore, this paper focuses on performance of the optical method in detecting biomarkers in the exhaled air. There are discussed some examination results of the constructed devices. The devices operated on the basis of enhanced cavity and wavelength modulation spectroscopies. The experimental data used for analyzing applicability of these different sensing technologies in medical screening. Several suggestions related to future development are also discussed.

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“…Trace gas sensors are used in numerous applications, such as environmental science (e.g., monitoring of atmospheric pollutants) [ 1 ], medical diagnostics (e.g., breath analysis) [ 2 ], industrial control [ 3 ] and the detection of dangerous substances (e.g., toxic gases or explosives) [ 4 ]. There are many methods that can be used to implement trace gas sensors.…”

Section: Introductionmentioning

confidence: 99%

A High Sensitivity Preamplifier for Quartz Tuning Forks in QEPAS (Quartz Enhanced PhotoAcoustic Spectroscopy) Applications

Starecki

Wieczorek

2017

Sensors

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All the preamplifiers dedicated for Quartz Enhanced PhotoAcoustic Spectroscopy (QEPAS) applications that have so far been reported in the literature have been based on operational amplifiers working in transimpedance configurations. Taking into consideration that QEPAS sensors are based on quartz tuning forks, and that quartz has a relatively high voltage constant and relatively low charge constant, it seems that a transimpedance amplifier is not an optimal solution. This paper describes the design of a quartz QEPAS sensor preamplifier, implemented with voltage amplifier configuration. Discussion of an electrical model of the circuit and preliminary measurements are presented. Both theoretical analysis and experiments show that use of the voltage configuration allows for a substantial increase of the output signal in comparison to the transimpedance circuit with the same tuning fork working in identical conditions. Assuming that the sensitivity of the QEPAS technique depends directly on the properties of the preamplifier, use of the voltage amplifier configuration should result in an increase of QEPAS sensitivity by one to two orders of magnitude.

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Application of quantum cascade lasers to trace gas detection

Cited by 25 publications

References 34 publications

Ammonia Gas Sensors: Comparison of Solid-State and Optical Methods

Ammonia Gas Sensors: Comparison of Solid-State and Optical Methods

Detection of Gaseous Compounds with Different Techniques

A High Sensitivity Preamplifier for Quartz Tuning Forks in QEPAS (Quartz Enhanced PhotoAcoustic Spectroscopy) Applications

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