This article is cited in 6 papers

Physical optics

The quasi-optical equation in media with weak absorption

N. N. Rosanov<sup>abc

a</sup> S. I. Vavilov State Optical Institute
^b Ioffe Institute, St. Petersburg
^c St. Petersburg National Research University of Information Technologies, Mechanics and Optics

Abstract: The form of a quasi-optical equation for a beam of monochromatic radiation propagating through a layer of a weakly absorbing linear medium is analyzed. It is concluded that the standard form of this equation should be modified using an “effective diffusion coefficient.”

Keywords: quasi-optical approximationб slowly varying envelope method, effective diffusion coefficient.

Received: 25.03.2019
Revised: 25.03.2019
Accepted: 16.04.2019

DOI: 10.21883/OS.2019.08.48042.122-19

 English version: Optics and Spectroscopy, 2019, 127:2, 285–287

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