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Narrowing of the linewidth of an optical parametric oscillator by an acousto-optic modulator for the realization of mid-IR noise-immune cavity-enhanced optical heterodyne molecular spectrometry down to 10(-10) cm(-1) Hz(-1/2)
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Physics.
2015 (English)In: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 23, no 26, 33641-33655 p., UNSP 252446Article in journal (Refereed) PublishedText
Abstract [en]

The linewidth of a singly resonant optical parametric oscillator (OPO) has been narrowed with respect to an external cavity by the use of an acousto-optic modulator (AOM). This made possible an improvement of the sensitivity of a previously realized OPO-based noise-immune cavity-enhanced optical heterodyne molecular spectrometry instrument for the 3.2 - 3.9 mu m mid-infrared region by one order of magnitude. The resulting system shows a detection sensitivity for methane of 2.4 x 10(-10) cm(-1) Hz(-1/2) and 1.3 x 10(-10) cm(-1) at 20 s, which allows for detection of both the environmentally important (CH4)-C-13 and CH3D isotopologues in atmospheric samples. (C) 2015 Optical Society of America

Place, publisher, year, edition, pages
2015. Vol. 23, no 26, 33641-33655 p., UNSP 252446
Keyword [en]
VOE RG, 1984, PHYSICAL REVIEW A, V30, P2827 ittaker K. E., 2012, APPLIED PHYSICS B-LASERS AND OPTICS, V109, P333 Cartt A. D., 2015, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM
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Physical Sciences
Identifiers
URN: urn:nbn:se:umu:diva-116097DOI: 10.1364/OE.23.033641ISI: 000368004600074OAI: oai:DiVA.org:umu-116097DiVA: diva2:901611
Available from: 2016-02-08 Created: 2016-02-08 Last updated: 2016-02-08Bibliographically approved

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Hausmaninger, ThomasSilander, IsakAxner, Ove
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