Title: The measurement of two photon absorption cross-section of SF<inf>6</inf> by TEA-CO<inf>2</inf> laser
Abstract: The single photon absorption cross-section of <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">32</sup> SF <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</sub> was previously reported to be 3.6 times 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-17</sup> cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> at 947 cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> . However, its two photon absorption cross-section has not been reported yet. In this work, at first the theoretical expression was derived based on the rate equations including single and two photon absorption process. Then, an empirical set up was performed to measure directly the input and output signals in a SF <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</sub> filled irradiation chamber. Those results were inserted into the theoretical expression using least square method to fit the best regression line. Subsequently, the two photon absorption cross-section was determined to be 2.2times10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-45</sup> cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</sup> s.
Publication Year: 2008
Publication Date: 2008-06-01
Language: en
Type: article
Indexed In: ['crossref']
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