Autor: Bielecki, J. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Cavity Enhanced Absorption Spectroscopy Sensor
Autorzy:: Nowakowski, M.
Wojtas, J.
Bielecki, Z.
Mikołajczyk, J.
Powiązania:: https://bibliotekanauki.pl/articles/1807740.pdf
Data publikacji:: 2009-09
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 07.50.Qx
42.79.Sz
43.60.-c
07.07.Df
Opis:: The paper presents opportunities of cavity enhanced absorption spectroscopy technique application in nitrogen oxides (NO_{x}) detection. In this method the concentration of an absorbing gas is determined by measure of decay time of the light pulse trapped in an optical cavity. The measurements are not sensitive to fluctuation of both laser power and photodetector sensitivity. The cavity enhanced absorption spectroscopy technique is a modification of cavity ring down spectroscopy technique where the off-axis adjustment of the resonator is used. NO_{x} detection is carried out in the visible and infrared range. The signal is registered with a developed low noise photoreceiver. Features of the presented sensor show that it is possible to build a portable trace gases sensor. Its sensitivity could be comparable with chemical detectors. Such a system has several advantages: relatively low price, small size and weight, and detection possibility of other gases.
Źródło:: Acta Physica Polonica A; 2009, 116, 3; 363-367
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

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

Skocz do pozycji: 3.

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

Skocz do pozycji: 4.

Tytuł:: Investigation of Free Space Optical Detection Module Operating at the Wavelength Range of 8-12 μm
Autorzy:: Gutowska, M.
Nowakowski, M.
Bielecki, Z.
Mikolajczyk, J.
Szabra, D.
Paliwoda, R.
Pedzinska, M.
Pawluczyk, J.
Gawron, W.
Powiązania:: https://bibliotekanauki.pl/articles/1506789.pdf
Data publikacji:: 2010-12
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 07.07.Df
85.60.Bt
Opis:: The paper presents the construction and test results of a long-term radiation detector module for free space optical communication operated at the wavelength range of 8-12 μm. In the module a Polish detector manufactured in the company Vigo System S.A. was applied. High sensitivity of the detection module was achieved through a multi-layered heterostructure HgCdTe with immersion lens, which is optimized for the radiation detection at the wavelength of 10 μm. Detector noises were reduced as a result of detector cooling by means of four-stage thermoelectric cooler. The developed detection module is dedicated to design a next-generation optical data link. The link will be characterized by a greater range in difficult weather conditions in relation to the currently offered links operating at the shorter wavelengths.
Źródło:: Acta Physica Polonica A; 2010, 118, 6; 1143-1147
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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