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    Wyświetlanie 1-7 z 7
    Tytuł:
    Application of quantum cascade lasers to trace gas detection
    Autorzy:
    Bielecki, Z.
    Stacewicz, T.
    Wojtas, J.
    Mikołajczyk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/201703.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    absorption spectroscopy
    biomarkers
    sensors
    gas sensors
    cavity enhanced spectroscopy
    photoacoustic spectroscopy
    spektroskopia absorpcyjna
    biomarkery
    czujniki gazu
    spektroskopia wzmocniona
    spektroskopia fotoakustyczna
    Opis:
    The potential of Quantum Cascade Laser technology has been recently harnessed in industry, medicine and military to create a range of original infrared gas sensors. These sensors have opened up many new applications due to compact size, excellent sensitivity, robust construction and low power requirements. They rely on infrared absorption spectroscopy to determine identity and quantity of gases. The measurement of these gases has relied on different technologies including multi-pass spectroscopy, photoacoustic spectroscopy, cavity ring down spectroscopy, and their various modifications. In this review paper some technologies are described in terms of its advantages/disadvantages in many application. The results of own works about methane, ammonia, nitric oxide, nitrous oxide, and carbonyl sulfide detection are presented as well.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 2; 515-525
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nitrogen Oxides Optoelectronic Sensors Operating in Infrared Range of Wavelengths
    Autorzy:
    Wojtas, J.
    Bielecki, Z.
    Stacewicz, T.
    Mikolajczyk, J.
    Rutecka, B.
    Medrzycki, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399410.pdf
    Data publikacji:
    2013-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    07.07.Df
    42.25.Dd
    42.55.Px
    42.60.Da
    42.62.Fi
    85.60.-q
    Opis:
    Investigation of nitric oxide and nitrous oxide optoelectronic sensors is described. The detection of both components was done by measurement of absorption that occurs due to transition between vibronic molecular transitions. The improvement of the sensitivity was achieved due to application of cavity enhanced absorption spectroscopy. Two optical cavities (each one for each gas) built of high reflectance spherical mirrors were used. While the spectra of observed transitions are situated in mid-infrared range, two single mode quantum cascade lasers were applied. Their narrow emission lines were precisely tuned to the absorption lines of both investigated gases. The measurement of different mixtures of $Ar-NO$ and $Ar-N_2O$ within the range from 100 ppb to 10 ppm was performed. The relative uncertainty of the results did not exceed the level of 13%.
    Źródło:
    Acta Physica Polonica A; 2013, 124, 3; 592-594
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of Quantum Cascade Lasers in Nitric Oxide and Nitrous Oxide Detection
    Autorzy:
    Wojtas, J.
    Bielecki, Z.
    Stacewicz, T.
    Mikolajczyk, J.
    Medrzycki, R.
    Rutecka, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1493346.pdf
    Data publikacji:
    2011-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    07.07.Df
    42.25.Dd
    42.55.Px
    42.60.Da
    42.62.Fi
    Opis:
    Application of quantum cascade lasers in NO and $N_2O$ sensor is described. Cavity enhanced absorption spectroscopy was used for this purpose. The detection was performed at vibronic molecular transitions in spectral regions of 5.23-5.29 μm and 4.46-4.54 μm for NO and $N_2O$, respectively. In order to avoid interferences by the gases contained in atmosphere $(H_2O, CO_2)$ the lines of 5.263 μm for NO and 4.530 μm for $N_2O$ were selected. Our two channel sensor is designated for simultaneous detection of both compounds. Each channel consists of single mode quantum cascade laser, optical cavity, and a photodetection module. The lasers were precisely tuned to the wavelength of interest. Optical cavities were built with spherical mirrors of high reflectance. The signals from the cavities outputs were registered with specially developed low noise detection modules.
    Źródło:
    Acta Physica Polonica A; 2011, 120, 4; 794-797
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optoelektroniczne sensory gazów
    Optoelectronic gas sensors
    Autorzy:
    Bielecki, Z.
    Wojtas, J.
    Stacewicz, T.
    Mikołajczyk, J.
    Rutecka, B.
    Mędrzycki, R.
    Prokopiuk, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/152878.pdf
    Data publikacji:
    2013
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    sensory gazów
    spektroskopia strat we wnęce optycznej
    wykrywanie materiałów wybuchowych
    analiza wydychanego powietrza
    gas sensors
    cavity ring-down spectroscopy
    explosives detection
    breath analyses
    Opis:
    W artykule przedstawiono prace dotyczące optoelektronicznych sensorów gazów oraz osiągnięcia własne w zakresie wykrywania tlenków azotu (NOx). W sensorach do wykrywania NOx zastosowano polskie lasery emitujące promieniowanie o długości fali 410 nm oraz nowoczesne kwantowe lasery kaskadowe na zakres podczerwieni. Opracowane sensory charakteryzują się czułością graniczną na poziomie ppb i mogą być zastosowane do monitoringu zanieczyszczeń atmosfery, wykrywania materiałów wybuchowych oraz w diagnostyce chorób.
    The paper presents an overview of a few optoelectronic technologies for gases detection. Two sensors of nitrogen oxides (NOx) are also described. In the sensors the cavity enhanced absorption spectroscopy was applied. It is characterized by a very good sensitivity and selectivity of the detection process. The main aspect of its operation bases on absorption of the light by specific compounds. The identification of the matter is determined by spectral matching of the two spectra: optical radiation and absorption lines of species of interest. In contrast to the remote detection methods, the measurements are made at the place of sampling. Polish laser diodes and modern quantum cascade lasers were used there. Laser emission wavelengths were located in the visible (410 nm) and infrared range. The detection limit of ppb level was achieved. Due to that, they can be successfully applied to monitoring of atmospheric pollution, explosives detection and in diseases diagnosis. The preliminary studies using the developed sensors showed that it was possible to detect explosives such as TNT, PETN, RDX, HMX at the level of ng. Additionally, there is also discussed application of sensors to analysis of the exhaled air. This will be particularly useful for: the early detection of a disease, the monitoring of the therapy, the monitoring of the greenhouse exogenous (bacterial emissions or toxins), or the analysis of metabolic gases.
    Źródło:
    Pomiary Automatyka Kontrola; 2013, R. 59, nr 4, 4; 287-291
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Detection of Gaseous Compounds with Different Techniques
    Autorzy:
    Mikołajczyk, J.
    Bielecki, Z.
    Stacewicz, T.
    Smulko, J.
    Wojtas, J.
    Szabra, D.
    Lentka, Ł.
    Prokopiuk, A.
    Magryta, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/220919.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    gas sensors
    laser absorption spectroscopy
    CEAS
    MUPASS
    breath analyses
    medical screening
    Opis:
    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.
    Źródło:
    Metrology and Measurement Systems; 2016, 23, 2; 205-224
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sensors and systems for the detection of explosive devices - an overview
    Autorzy:
    Bielecki, Z.
    Janucki, J.
    Kawalec, A.
    Mikołajczyk, J.
    Pałka, N.
    Pasternak, M.
    Pustelny, T.
    Stacewicz, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/221624.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    explosive device sensors
    detection of explosive materials
    Opis:
    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.
    Źródło:
    Metrology and Measurement Systems; 2012, 19, 1; 3-28
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    System of Optoelectronic Sensors for Breath Analysis
    Autorzy:
    Mikołajczyk, J.
    Wojtas, J.
    Bielecki, Z.
    Stacewicz, T.
    Szabra, D.
    Magryta, P.
    Prokopiuk, A.
    Tkacz, A.
    Panek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/221463.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    breath analyses
    biomarkers
    laser absorption spectroscopy
    CEAS
    MUPASS
    medical screening
    Opis:
    The paper describes an integrated laser absorption system as a potential tool for breath analysis for clinical diagnostics, online therapy monitoring and metabolic disorder control. The sensors operate basing on cavity enhanced spectroscopy and multi-pass spectroscopy supported by wavelength modulation spectroscopy. The aspects concerning selection of operational spectral range and minimization of interference are also discussed. Tests results of the constructed devices collected with reference samples of biomarkers are also presented. The obtained data provide an opportunity to analyse applicability of optoelectronic sensors in medical screening.
    Źródło:
    Metrology and Measurement Systems; 2016, 23, 3; 481-489
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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