Impact of broadened laser line-shape on retrievals of atmospheric species from lidar sounding absorption spectra

We examine the impact of broadened laser line-shape on retrievals of atmospheric species from lidar-sounding absorption spectra. The laser is assumed to be deterministically modulated into a stable, nearly top-hat frequency comb to suppress the stimulated Brillouin scattering, allowing over 10-fold...

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Bibliographic Details
Published inOptics express Vol. 23; no. 3; pp. 2660 - 2675
Main Authors Chen, Jeffrey R, Numata, Kenji, Wu, Stewart T
Format Journal Article
LanguageEnglish
Published United States 09.02.2015
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Summary:We examine the impact of broadened laser line-shape on retrievals of atmospheric species from lidar-sounding absorption spectra. The laser is assumed to be deterministically modulated into a stable, nearly top-hat frequency comb to suppress the stimulated Brillouin scattering, allowing over 10-fold pulse energy increase without adding measurement noise. Our model remains accurate by incorporating the laser line-shape factor into the effective optical depth. Retrieval errors arising from measurement noise and model bias are analyzed parametrically and numerically to provide deeper insight. The stable laser line-shape broadening minimally degrades the column-averaged retrieval, but can significantly degrade the multiple-layer retrievals.
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content type line 23
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.23.002660