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Frequency-modulation spectroscopy with blue diode lasers

Gustafsson, U; Somesfalean, Gabriel LU ; Alnis, J and Svanberg, Sune LU (2000) In Applied Optics 39(21). p.3774-3780
Abstract
Frequency-modulation spectroscopy provides ultrasensitive absorption measurements. The technique is especially adaptable to diode lasers, which can be modulated easily, and has been used extensively in the near-infrared and infrared spectral regions. The availability of blue diode lasers now means that the accessible wavelength region can be increased. We successfully demonstrate wavelength-modulation spectroscopy and two-tone frequency-modulation spectroscopy for the weak second resonance line of potassium at 404.8 nm and for the transition at 405.8 nm in lead, starting from the thermally populated 6p(2) P-3(2) metastable level, information on the modulation parameters is obtained with a fitting procedure. Experimental signal-to-noise... (More)
Frequency-modulation spectroscopy provides ultrasensitive absorption measurements. The technique is especially adaptable to diode lasers, which can be modulated easily, and has been used extensively in the near-infrared and infrared spectral regions. The availability of blue diode lasers now means that the accessible wavelength region can be increased. We successfully demonstrate wavelength-modulation spectroscopy and two-tone frequency-modulation spectroscopy for the weak second resonance line of potassium at 404.8 nm and for the transition at 405.8 nm in lead, starting from the thermally populated 6p(2) P-3(2) metastable level, information on the modulation parameters is obtained with a fitting procedure. Experimental signal-to-noise ratios: at different absorption levels are compared with theoretical signal-to-noise ratios and show good agreement. Detection sensitivities of 2 x 10(-6) and 5 x 10(-6) for wavelength and two-tone frequency-modulation spectroscopy, respectively, for a 120-Hz bandwidth are demonstrated. (C) 2000 Optical Society of America. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Applied Optics
volume
39
issue
21
pages
3774 - 3780
publisher
OSA
external identifiers
  • scopus:0000110180
ISSN
2155-3165
DOI
10.1364/AO.39.003774
language
English
LU publication?
yes
id
fd527a43-0091-4ae7-80db-c80ccfe9bbd6 (old id 2258305)
date added to LUP
2012-02-21 00:24:02
date last changed
2017-01-01 07:41:24
@article{fd527a43-0091-4ae7-80db-c80ccfe9bbd6,
  abstract     = {Frequency-modulation spectroscopy provides ultrasensitive absorption measurements. The technique is especially adaptable to diode lasers, which can be modulated easily, and has been used extensively in the near-infrared and infrared spectral regions. The availability of blue diode lasers now means that the accessible wavelength region can be increased. We successfully demonstrate wavelength-modulation spectroscopy and two-tone frequency-modulation spectroscopy for the weak second resonance line of potassium at 404.8 nm and for the transition at 405.8 nm in lead, starting from the thermally populated 6p(2) P-3(2) metastable level, information on the modulation parameters is obtained with a fitting procedure. Experimental signal-to-noise ratios: at different absorption levels are compared with theoretical signal-to-noise ratios and show good agreement. Detection sensitivities of 2 x 10(-6) and 5 x 10(-6) for wavelength and two-tone frequency-modulation spectroscopy, respectively, for a 120-Hz bandwidth are demonstrated. (C) 2000 Optical Society of America.},
  author       = {Gustafsson, U and Somesfalean, Gabriel and Alnis, J and Svanberg, Sune},
  issn         = {2155-3165},
  language     = {eng},
  number       = {21},
  pages        = {3774--3780},
  publisher    = {OSA},
  series       = {Applied Optics},
  title        = {Frequency-modulation spectroscopy with blue diode lasers},
  url          = {http://dx.doi.org/10.1364/AO.39.003774},
  volume       = {39},
  year         = {2000},
}