Applying CEAS method to UV, VIS, and IR spectroscopy sensors

Wojtas, J.; Mikołajczyk, J.; Nowakowski, M.; Rutecka, B.; Mędrzycki, R.; Bielecki, Z.

doi:10.2478/v10175-011-0050-x

Cited by 22 publications

(16 citation statements)

References 8 publications

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“…The wavelength was selected by taking into account the radiation sources available on the market (quan− tum cascade lasers -QCL) and interferences by water vapour. Therefore for NO, the wavelength of 5.282 μm was chosen [29]. The effective detection also requires the tuning of the laser line to a certain absorption peak with precision of 10 -5 -10 -6 .…”

Section: Spectroscopic Properties Of Breath Compoundsmentioning

confidence: 99%

Ultrasensitive laser spectroscopy for breath analysis

Wojtas

Bielecki

Stacewicz

et al. 2012

Opto-Electronics Review

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At present there are many reasons for seeking new methods and technologies that aim to develop new and more perfect sensors for different chemical compounds. However, the main reasons are safety ensuring and health care. In the paper, recent advances in the human breath analysis by the use of different techniques are presented. We have selected non-invasive ones ensuring detection of pathogenic changes at a molecular level. The presence of certain molecules in the human breath is used as an indicator of a specific disease. Thus, the analysis of the human breath is very useful for health monitoring. We have shown some examples of diseases’ biomarkers and various methods capable of detecting them. Described methods have been divided into non-optical and optical methods. The former ones are the following: gas chromatography, flame ionization detection, mass spectrometry, ion mobility spectrometry, proton transfer reaction mass spectrometry, selected ion flow tube mass spectrometry. In recent twenty years, the optical methods have become more popular, especially the laser techniques. They have a great potential for detection and monitoring of the components in the gas phase. These methods are characterized by high sensitivity and good selectivity. The spectroscopic sensors provide the opportunity to detect specific gases and to measure their concentration either in a sampling place or a remote one. Multipass spectroscopy, cavity ring-down spectroscopy, and photo-acoustic spectroscopy were characterised in the paper as well.

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Section: Spectroscopic Properties Of Breath Compoundsmentioning

confidence: 99%

Ultrasensitive laser spectroscopy for breath analysis

Wojtas

Bielecki

Stacewicz

et al. 2012

Opto-Electronics Review

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“…The system provides an opportunity for simultaneous detection of trace concentration of two non-interacting gases with different absorption spectra [101,102]. Then the wavelengths of both channels should be appropriately matched to the absorption spectra of the investigated gases.…”

Section: Cavity Enhanced Absorption Spectroscopymentioning

confidence: 99%

Sensors and Systems for the Detection of Explosive Devices - An Overview

Bielecki¹,

Janucki²,

Kawalec³

et al. 2012

Metrology and Measurement Systems

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The paper presents analyses of current research projects connected with explosive material sensors. Sensors are described assigned to X and γ radiation, optical radiation sensors, as well as detectors applied in gas chromatography, electrochemical and chemical sensors. Furthermore, neutron techniques and magnetic resonance devices were analyzed. Special attention was drawn to optoelectronic sensors of explosive devices.

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“…Luminescence in the visible spectral range. Rapid development of fibre sensors encourages the quest for new and efficient sources of radiation in the visible spectrum which would be noticeable for their high stability of emission and compactness [34,35]. Allocating several lanthanide ions in a single matrix offers a possibility of producing luminescence by means of transitions which are difficult to realize through direct optical pumping.…”

Section: +mentioning

confidence: 99%

Active optical fibres for application in laser and broadband ASE sources

Dorosz¹,

Dorosz²,

Zając³

et al. 2012

Bulletin of the Polish Academy of Sciences: Technical Sciences

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Abstract. The article brings into focus the present state of technology employing active fibres doped with rare earth (RE) ions for applications requiring power supply of several dozen watts and broadband ASE sources. Current trends in development of glasses and in construction of active fibres used in fibre sources of radiation within VIS-NIR range are presented. Technological constraints in the doping of fibre core glasses are discussed, with particular consideration of optimal RE concentration for technical applications. Characteristics of glasses are offered, and the glasses are used for manufacturing optical fibres with luminescence within the visible as well as near-and mid-infrared ranges. Also, requirements and luminescence properties concerning glasses co-doped with e.g. Nd 3+ /Yb 3+ ,Tm 3+ /Ho 3+ and Yb 3+ /Tb 3+ are discussed. Results of research on the impact of technological parameters of glass matrices on luminescence properties of core glasses and optical fibres are quoted. For the doped glasses of which luminescence in a wide spectral range is desired, conditions for their processing into optical fibre systems are mentioned. Additionally, the impact of phonon energy in the glass on producing emission in a specified spectral range is analyzed. Furthermore, the article presents directions of technological studies to solve problems persisting in the phase of glass matrix design, as well as in determining the influence of fibre drawing process on the luminescence properties of core glasses and optical fibres, confirming the differences in luminescence stemming from the drawing process. Finally, some original designs of core glasses and active multicore fibre systems devised for construction of fibre radiation sources are presented.

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Applying CEAS method to UV, VIS, and IR spectroscopy sensors

Cited by 22 publications

References 8 publications

Ultrasensitive laser spectroscopy for breath analysis

Ultrasensitive laser spectroscopy for breath analysis

Sensors and Systems for the Detection of Explosive Devices - An Overview

Active optical fibres for application in laser and broadband ASE sources

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