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Direct and wavelength modulation spectroscopy using a cw external cavity quantum cascade laser
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10.1063/1.3141521
/content/aip/journal/apl/94/20/10.1063/1.3141521
http://aip.metastore.ingenta.com/content/aip/journal/apl/94/20/10.1063/1.3141521
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Transmitted intensity after a path length of 2 m in laboratory air ( water in the laboratory air) showing a spectrum of the band of water between 1872 and obtained by scanning with the laser controller. The line positions and intensities from the HITRAN 2004 spectral database are plotted as a stick spectrum in the lower part of the figure. (b) A typical spectrum of the transition of water recorded by scanning the PZT.

Image of FIG. 2.
FIG. 2.

(a) Spectrum of 140 mTorr of NO for the R(8.5) rovibrational transition centered at . (b) The corresponding WMS spectrum.

Image of FIG. 3.
FIG. 3.

(a) WMS spectra of 140 mTorr of NO for the Q(2.5) rovibrational transition centered at as a function of modulation amplitude. (b) The amplitude of the second harmonic WMS signal as a function of the applied modulation voltage.

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/content/aip/journal/apl/94/20/10.1063/1.3141521
2009-05-21
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Direct and wavelength modulation spectroscopy using a cw external cavity quantum cascade laser
http://aip.metastore.ingenta.com/content/aip/journal/apl/94/20/10.1063/1.3141521
10.1063/1.3141521
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