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Tittel [sv]
Kavitetsförstärkt frekvenskamspektroskopi - En teknik för känslig samtidig multiämnesdetektion av molekyler i gasfas.
Tittel [en]
Cavity-enhanced optical frequency comb spectroscopy - A technique for sensitive simultaneous detection of molecules in gas phase.
Abstract [sv]
Optical frequency comb (OFC) spectroscopy combines the high resolution and sensitivity of laser spectroscopy with broad spectral coverage offered by conventional broadband absorption techniques. It allows simultaneous multispecies detection in short acquisition times with high species selectivity and absorption sensitivity. The project is aimed at development of broadband cavity-enhanced direct frequency comb spectroscopy (CE-DFCS) for sensitive detection of molecules in gas phase that are of importance in applications such as breath analysis, climate studies or explosives detection. Two CE-DFCS detection systems will be developed, the first based on a commercial fully-stabilized near-infrared OFC, and the second based on a home-built mid-infrared optical parametric oscillator. The latter will provide access to the molecular fingerprint region, where the strong fundamental transitions of many molecules lie, and allow detecting molecular concentrations at part-per-trillion levels. In order to achieve ultrahigh absorption sensitivity a new detection scheme will be developed, integrating for first time frequency modulation technique with CE-DFCS. Sub-Doppler spectroscopy will be performed with the resolved modes of the OFC to achieve unprecedented resolution. Systematic studies of absorption line shapes and parameters will be conducted.
Principal InvestigatorFoltynowicz Matyba, Aleksandra
Koordinerande organisasjon
Umeå universitet
Forskningsfinansiär
Tidsperiod
2013-01-01 - 2016-12-31
HSV kategori
Atom and Molecular Physics and Optics
Identifikatorer
DiVA, id: project:1241Prosjekt id: 2012-03650_VR

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