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Titolo:
Analysis of gas dispersed in scattering media
Autore:
Sjoholm, M; Somesfalean, G; Alnis, J; Andersson-Engels, S; Svanberg, S;
Indirizzi:
Lund Inst Technol, Dept Phys, S-22100 Lund, Sweden Lund Inst Technol Lund Sweden S-22100 l, Dept Phys, S-22100 Lund, Sweden
Titolo Testata:
OPTICS LETTERS
fascicolo: 1, volume: 26, anno: 2001,
pagine: 16 - 18
SICI:
0146-9592(20010101)26:1<16:AOGDIS>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
FREQUENCY-MODULATION; TRANSILLUMINATION; SPECTROSCOPY; LASER; BLOOD;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
--discip_EC--
Citazioni:
15
Recensione:
Indirizzi per estratti:
Indirizzo: Sjoholm, M Lund Inst Technol, Dept Phys, POB 118, S-22100 Lund, Sweden Lund Inst Technol POB 118 Lund Sweden S-22100 100 Lund, Sweden
Citazione:
M. Sjoholm et al., "Analysis of gas dispersed in scattering media", OPTICS LETT, 26(1), 2001, pp. 16-18

Abstract

Monitoring of free gas embedded in scattering media, such as wood, fruits,and synthetic materials, is demonstrated by use of diode laser spectroscopy combined with sensitive modulation techniques. Gas detection is made possible by the contrast of the narrow absorptive feature of the free-gas molecules with the slow wavelength dependence of the absorption and scattering cross sections in solids and liquids. An absorption sensitivity of 2.5 x 10(-4), corresponding to a 1.25-mm air column, is demonstrated by measurementsof dispersed molecular oxygen. These techniques open up new possibilities for characterization and diagnostics, including internal gas pressure and gas-exchange assessment, in organic and synthetic materials. (C) 2001 Optical Society of America. OCIS codes: 300.6360, 290.7050, 290.5820, 170.3660, 020.3690, 160.4890.

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Documento generato il 02/04/20 alle ore 18:52:02