Vol. 10, issue 03, article # 7

pdf Kolosov V. V. Applicability limits of the transfer equation to description of spontaneous radiation amplification in an inhomogeneous active medium. // Atmospheric and oceanic optics. 1997. V. 10. No. 03. P. 176-180.
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This paper describes an analytical solution of the exact equation for coherence function for parabolic profiles of the refractive index and amplification coefficient distribution in an active medium cross-section. The applicability limits of the radiation transfer equation are analyzed by a direct comparison of analytical solutions of the equation for coherence function and the radiation transfer equation for a wide range of the active medium dimensionless parameters. The problem of the applicability limits is also discussed based on a comparative analysis of general solutions of the exact and approximate integral equations.