Vol. 5, issue 11, article # 17

pdf Ippolitov I. I. The conditions of stationarity of the absorption coefficient under optical pulse propagation through a double-level medium. // Atmospheric and oceanic optics. 1992. V. 5. No. 11. P. 783-786.
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Propagation of a Gaussian pulse through a double–level medium is considered. Based on the system of Bloch–Maxwell equations the approaches that result in Bouguer's law with the absorption coefficient independent of time are analyzed.