Application of an optical parametric generator to cavity enhanced experiment

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

doi:10.1117/12.872228

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…The value of absorption cross section and parameters of the sensors make it possible to reach a ppb level detection limit [30]. Additionally, in the described wavelength ranges there is no significant interference from absorption lines of other atmospheric gases (e.g., CO 2 , H 2 O).…”

Section: Introductionmentioning

confidence: 99%

Aspects of the Application of Cavity Enhanced Spectroscopy to Nitrogen Oxides Detection

Wojtas

Mikołajczyk

Bielecki

2013

Sensors

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This article presents design issues of high-sensitive laser absorption spectroscopy systems for nitrogen oxides (NOx) detection. Examples of our systems and their investigation results are also described. The constructed systems use one of the most sensitive methods, cavity enhanced absorption spectroscopy (CEAS). They operate at different wavelength ranges using a blue—violet laser diode (410 nm) as well as quantum cascade lasers (5.27 μm and 4.53 μm). Each of them is configured as a one or two channel measurement device using, e.g., time division multiplexing and averaging. During the testing procedure, the main performance features such as detection limits and measurements uncertainties have been determined. The obtained results are 1 ppb NO2, 75 ppb NO and 45 ppb N2O. For all systems, the uncertainty of concentration measurements does not exceed a value of 13%. Some experiments with explosives are also discussed. A setup equipped with a concentrator of explosives vapours was used. The detection method is based either on the reaction of the sensors to the nitrogen oxides directly emitted by the explosives or on the reaction to the nitrogen oxides produced during thermal decomposition of explosive vapours. For TNT, PETN, RDX and HMX a detection limit better than 1 ng has been achieved.

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Section: Introductionmentioning

confidence: 99%

Aspects of the Application of Cavity Enhanced Spectroscopy to Nitrogen Oxides Detection

Wojtas

Mikołajczyk

Bielecki

2013

Sensors

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“…The analyses show that the IR wavelength range provides the possibility to develop NO and N 2 O sensor, the sensitivity of which could reach the ppb level (Rutecka, 2010 Fig. 14 and in Fig.…”

Section: Wwwintechopencommentioning

confidence: 94%

Detection of Optical Radiation in NOx Optoelectronic Sensors Employing Cavity Enhanced Absorption Spectroscopy

Wojtas¹

2011

Optoelectronics - Devices and Applications

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“…They were designed to measure a trace concentration of nitrogen dioxide (NO 2 ), nitric oxide (NO), and nitrous oxide (N 2 O). The main elements of the sensors were pulsed laser diode, optical cavity, photoreceiver, signal processing unit, and a computer with special software [55][56][57][58].…”

Section: Examples Of Concentrator Applicationmentioning

confidence: 99%

Concentration system for volatile compounds detection

Rutecka

Wojtas

Mikołajczyk

et al. 2013

Safety and Security Engineering V

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Detection of trace amounts of substance is a challenging task in many technologies. Nowadays, a lot of detection systems operate at the detection limit. It is observed especially in such areas as medicine or security; for example, in explosive detection. In medicine, the technology of trace substance detection is associated with breath analysis. Some specific diseases can change the concentration of certain molecules (biomarkers) in the exhaled air. Because of the extremely low concentration of explosives' vapour and volatile compounds in exhausted breath, very sensitive detection instruments and an efficient system for their collection are needed. For this purpose, special devices-so-called concentrators-can be applied. Available solutions of the concentrators are dedicated to a specific detection system. The paper presents some projects of a concentration system, designed to cooperate with an optoelectronic sensor using cavity enhanced absorption spectroscopy (CEAS). Preliminary investigation showed that this setup provides the opportunity to detect 1 ng of such explosives as TNT, PETN, RDX and HMX. The results have also shown that such instruments could be used to detect some disease biomarkers in human breath.

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Application of an optical parametric generator to cavity enhanced experiment

Cited by 3 publications

References 5 publications

Aspects of the Application of Cavity Enhanced Spectroscopy to Nitrogen Oxides Detection

Aspects of the Application of Cavity Enhanced Spectroscopy to Nitrogen Oxides Detection

Detection of Optical Radiation in NOx Optoelectronic Sensors Employing Cavity Enhanced Absorption Spectroscopy

Concentration system for volatile compounds detection

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