WFRF:(Harren F. J. M.)
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External cavity diode laser-based detection of trace gases with NICE-OHMS using current modulation
- Centeno, R. (author)
- Mandon, J. (author)
- Cristescu, S. M. (author)
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- Harren, F. J. M. (author)
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- (creator_code:org_t)
- 2015
- 2015
- English.
- In: Optics Express. - 1094-4087. ; 23:5, s. 6277-6282
- Journal article (peer-reviewed)
Abstract
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- We combine an external cavity diode laser with noise-immune cavity-enhanced optical heterodyne molecular spectroscopy (NICE-OHMS) using current modulation. With a finesse of 1600, we demonstrate noise equivalent absorption sensitivities of 4.1 x 10(-10) cm(-1) Hz(-1/2), resulting in sub-ppbv detection limits for Doppler-broadened transitions of CH4 at 6132.3 cm(-1), C2H2 at 6578.5 cm(-1) and HCN at 6541.7 cm(-1). The system is used for hydrogen cyanide detection from sweet almonds.
Subject headings
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
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- Centeno, R.
- Mandon, J.
- Cristescu, S. M.
- Axner, Ove
- Harren, F. J. M.
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- NATURAL SCIENCES
- NATURAL SCIENCES
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- Optics Express
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- Umeå University
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