This article is cited in 18 papers

Nonlinear optical phenomena

Threshold effect under nonlinear limitation of the intensity of high-power light

S. A. Tereshchenko, V. M. Podgaetskii, A. Yu. Gerasimenko, M. S. Savel'ev

National Research University of Electronic Technology "MIET"

Abstract: A model is proposed to describe the properties of limiters of high-power laser radiation, which takes into account the threshold character of nonlinear interaction of radiation with the working medium of the limiter. The generally accepted non-threshold model is a particular case of the threshold model if the threshold radiation intensity is zero. Experimental z-scan data are used to determine the nonlinear optical characteristics of media with carbon nanotubes, polymethine and pyran dyes, zinc selenide, porphyrin-graphene and fullerene-graphene. A threshold effect of nonlinear interaction between laser radiation and some of investigated working media of limiters is revealed. It is shown that the threshold model more adequately describes experimental z-scan data.

Keywords: limitation of laser radiation intensity, absorption coefficient, nonlinear optical characteristics, pulse shape, nonlinear absorption, z scanning.

PACS: 42.60.Jf, 42.65.An

Received: 28.05.2014
Revised: 30.07.2014

 English version: Quantum Electronics, 2015, 45:4, 315–320

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