Please use this identifier to cite or link to this item: http://archive.cmb.ac.lk:8080/xmlui/handle/70130/3973
Title: Gas spectroscopy and optical path-length assessment in scattering media using a frequency-modulated continuous-wave diode laser
Authors: Mei, Liang
Hiran H. E. Jayaweera
Svanberg, Sune
Somesfalean, Gabriel
Issue Date: 2011
Citation: 3036 OPTICS LETTERS / Vol. 36, No. 16 / August 15, 2011
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
URI: http://archive.cmb.ac.lk:8080/xmlui/handle/70130/3973
Appears in Collections:Department of Physics

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