Room-temperature Fe:ZnSe laser tunable in the spectral range of 3.7–5.3 µm applied for intracavity absorption spectroscopy of CO<sub>2</sub> isotopes, CO and N<sub>2</sub>O
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- Peter Fjodorow
- University of Duisburg-Essen
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- Mikhail P. Frolov
- Russian Academy of Sciences
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- Yuri V. Korostelin
- Russian Academy of Sciences
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- Vladimir I. Kozlovsky
- Russian Academy of Sciences
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- Christof Schulz
- University of Duisburg-Essen
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- Stanislav O. Leonov
- Russian Academy of Sciences
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- Yan K. Skasyrsky
- Russian Academy of Sciences
説明
<jats:p>We demonstrate an intracavity absorption spectroscopy system based on a broadband single-crystal pulsed Fe:ZnSe laser. The laser operates at room-temperature and is continuously tunable in the spectral range of 3.76–5.29 µm. The long-wavelength emission up to 5.29 µm is a record achievement for Fe:ZnSe lasers, to the best of our knowledge. The developed laser system is applied for measurements of gaseous absorption inside the laser resonator. We demonstrate sensitive detection of (i) CO<jats:sub>2</jats:sub> isotopes in the atmosphere and in human breath, (ii) CO in breath (after cigarette smoking) and in the smoke of a smoldering paper, and (iii) N<jats:sub>2</jats:sub>O in a gas flow. The achieved detection limits are: 0.1 ppm for <jats:sup>12</jats:sup>CO<jats:sub>2</jats:sub> and <jats:sup>13</jats:sup>CO<jats:sub>2</jats:sub>, 3 ppm for CO, and 1 ppm for N<jats:sub>2</jats:sub>O. The sensitivity of the current system is primarily limited by the short pump-pulse duration of 40 ns. Possibilities for sensitivity enhancement by up to a factor of 10<jats:sup>7</jats:sup> are discussed.</jats:p>
収録刊行物
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- Optics Express
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Optics Express 29 (8), 12033-, 2021-04-01
Optica Publishing Group