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Detection of elemental mercury by multimode diode laser correlation spectroscopy
KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
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2012 (English)In: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 20, no 5, 4927-4938 p.Article in journal (Refereed) Published
Abstract [en]

We demonstrate a method for elemental mercury detection based on correlation spectroscopy employing UV laser radiation generated by sum-frequency mixing of two visible multimode diode lasers. Resonance matching of the multimode UV laser is achieved in a wide wavelength range and with good tolerance for various operating conditions. Large mode-hops provide an off-resonance baseline, eliminating interferences from other gas species with broadband absorption. A sensitivity of 1 mu g/m(3) is obtained for a 1-m path length and 30-s integration time. The performance of the system shows promise for mercury monitoring in industrial applications.

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2012. Vol. 20, no 5, 4927-4938 p.
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URN: urn:nbn:se:kth:diva-92342DOI: 10.1364/OE.20.004927ISI: 000301053200012OAI: oai:DiVA.org:kth-92342DiVA: diva2:516390
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QC 20120418Available from: 2012-04-18 Created: 2012-04-02 Last updated: 2017-12-07Bibliographically approved

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