Transfer and Trapping of Resonance Radiation in a Two-Level System

The population kinetics of a two-level system has been theoretically investigated taking into account the transfer of spontaneous radiation under continuous optical pumping. It is shown that, when the photon mean free path in a resonantly absorbing medium is smaller than the characteristic size of t...

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Bibliographic Details
Published inOptics and spectroscopy Vol. 128; no. 8; pp. 1182 - 1186
Main Authors Yamshchikov, V. M., Rogachev, V. G., Kudryashov, E. A., Kachalin, G. N.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.08.2020
Springer Nature B.V
Subjects
Kinetics
Laser Physics and Laser Optics
Lasers
Optical Devices
Optical pumping
Optics
Photonics
Photons
Physics
Physics and Astronomy
level kinetics
spontaneous radiation transfer
increase in the medium transparency
diffusion approximation
two-level system
Biberman–Holstein equation
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Summary:The population kinetics of a two-level system has been theoretically investigated taking into account the transfer of spontaneous radiation under continuous optical pumping. It is shown that, when the photon mean free path in a resonantly absorbing medium is smaller than the characteristic size of this medium or comparable to it, the spontaneous radiation may become an additional pump source. The contribution of spontaneous photons to the kinetics of level has been considered within two approaches. The first approach consists of solution of the radiation transfer equation within the diffusion approximation. The second approach is related to solution of the Biberman–Holstein equation.
ISSN:0030-400X
1562-6911
DOI:10.1134/S0030400X20080391