CO laser sum-frequency comb for atmosphere sensing A. A. Ionin, I. O. Kinyaevskiy, Y. M. Klimachev [et al.]
Material type: ArticleSubject(s): инфракрасная спектроскопия | лазеры среднего ИК-диапазона | генерация суммарной частоты | анализ газаGenre/Form: статьи в журналах Online resources: Click here to access online In: Infrared physics and technology Vol. 100. P. 62-66Abstract: Sum-frequency spectrum of non-selective (multi-line)CO laser radiation generated in ZnGeP2 crystal under noncritical spectral phase-matching conditions was experimentally studied with spectral resolution of ∼0.1 cm⁻¹. The number of spectral lines for this spectrum was found to be about an order of magnitude larger than for previously reported one. Its spectral structure looked like a broadband mid-IR comb of multi-line groups having complicated substructure. That is attractive for the atmosphere sounding by both differential absorption technique and absorption line profile spectroscopy. A list of the atmosphere gases and pollutants that could be detected by these procedures was considered. An opportunity of absorption line profile measuring by means of CO laser sum-frequency comb was experimentally demonstrated for CO2 molecules.Sum-frequency spectrum of non-selective (multi-line)CO laser radiation generated in ZnGeP2 crystal under noncritical spectral phase-matching conditions was experimentally studied with spectral resolution of ∼0.1 cm⁻¹. The number of spectral lines for this spectrum was found to be about an order of magnitude larger than for previously reported one. Its spectral structure looked like a broadband mid-IR comb of multi-line groups having complicated substructure. That is attractive for the atmosphere sounding by both differential absorption technique and absorption line profile spectroscopy. A list of the atmosphere gases and pollutants that could be detected by these procedures was considered. An opportunity of absorption line profile measuring by means of CO laser sum-frequency comb was experimentally demonstrated for CO2 molecules.
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