10 February 2011 Atmospheric absorption spectroscopy using Tm: fiber sources around two microns
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We report on a thulium doped silica fiber ASE source for absorption spectroscopy of CO2. The average spectral power of this source was 2.3-6.1 μW/nm. This low spectral power of this source posed limitation in the sensitivity of the system which was overcome by using an ultrashort pulsed Raman amplifier system with 50-125 μW/nm average spectral power. This system produced CO2 sensitivity better than 300 ppm making measurement of CO2 possible at standard atmospheric concentrations.
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Pankaj Kadwani, Pankaj Kadwani, Jeffrey Chia, Jeffrey Chia, Faleh Altal, Faleh Altal, Robert A. Sims, Robert A. Sims, Christina Willis, Christina Willis, Lawrence Shah, Lawrence Shah, Dennis Killinger, Dennis Killinger, Martin C. Richardson, Martin C. Richardson, } "Atmospheric absorption spectroscopy using Tm: fiber sources around two microns", Proc. SPIE 7924, Atmospheric and Oceanic Propagation of Electromagnetic Waves V, 79240L (10 February 2011); doi: 10.1117/12.875167; https://doi.org/10.1117/12.875167

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