This article is cited in 1 paper

Control of laser radiation parameters

Transformation of the spatial coherence of pulsed laser radiation transmitted in the nonlinear regime through a multimode graded-index fibre

A. I. Kitsak^a, M. A. Kitsak<sup>b

a</sup> B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Minsk
^b Department of Physics, Boston University, USA

Abstract: A method is proposed for transformation of the spatial coherence of pulsed laser radiation upon nonlinear interaction in a multimode fibre. The specific features of the transmission of correlation properties of radiation in a graded-index fibre with regular and irregular profiles of the refractive index of the fibre core are analysed. A comparative analysis of the parameter of global degree of radiation coherence at the output of inhomogeneous waveguide and non-waveguide media is performed. It is shown that the most efficient mechanism of decorrelation of pulsed radiation in an optical fibre is fluctuations of the phase of radiation scattered by inhomogeneities of the refractive index of the fibre core induced due to nonlinear interaction with radiation with the spatially inhomogeneous intensity distribution.

PACS: 42.25Kb, 42.81.Dp

Received: 23.08.2005

 English version: Quantum Electronics, 2006, 36:1, 27–32

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