Gas spectroscopy and optical path-length assessment in scattering media using a frequency-modulated continuous-wave diode laser

dc.contributor.author	Mei, Liang
dc.contributor.author	Hiran H. E. Jayaweera
dc.contributor.author	Svanberg, Sune
dc.contributor.author	Somesfalean, Gabriel
dc.date.accessioned	2013-05-13T03:51:38Z
dc.date.available	2013-05-13T03:51:38Z
dc.date.issued	2011
dc.identifier.citation	3036 OPTICS LETTERS / Vol. 36, No. 16 / August 15, 2011	en_US
dc.identifier.uri	http://archive.cmb.ac.lk:8080/xmlui/handle/70130/3973
dc.description.abstract	Simultaneous assessment of the spectroscopic absorption signal of gas enclosed in a scattering medium and the corresponding optical path length of the probing light is demonstrated using a single setup. Sensitive gas absorption measurements are performed by a tunable diode laser using wavelength-modulation spectroscopy, while the path length is evaluated by the frequency-modulated cw technique commonly used in the field of telecommunication.Proof-of-principle measurements are demonstrated with water vapor as the absorbing gas and using polystyrene foam as an in homogeneously scattering medium. The combination of these techniques opens up new possibilities for straightforward evaluation of gas presence and exchange in scattering media. © 2011 Optical Society of America	en_US
dc.language.iso	en	en_US
dc.title	Gas spectroscopy and optical path-length assessment in scattering media using a frequency-modulated continuous-wave diode laser	en_US
dc.type	Research Abstract	en_US