Two-dimensional modeling of transient gain gratings in saturable gain media

A transient two-dimensional model describing degenerate four-wave mixing inside saturable gain media is presented. The new model is compared to existing one-dimensional models with their qualitative results confirmed. Large quantitative differences with respect to peak reflectivity and optimum pump...

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Bibliographic Details
Published inOptics express Vol. 20; no. 7; pp. 6887 - 6896
Main Authors Elsner, Robert, Ullmann, Roland, Heuer, Axel, Menzel, Ralf, Ostermeyer, Martin
Format Journal Article
LanguageEnglish
Published United States 26.03.2012
Subjects
Amplifiers, Electronic
Computer Simulation
Computer-Aided Design
Equipment Design
Equipment Failure Analysis
Lasers
Light
Models, Theoretical
Refractometry - instrumentation
Scattering, Radiation
Telecommunications - instrumentation
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Summary:A transient two-dimensional model describing degenerate four-wave mixing inside saturable gain media is presented. The new model is compared to existing one-dimensional models with their qualitative results confirmed. Large quantitative differences with respect to peak reflectivity and optimum pump fluence are observed. Furthermore, the influence of the beam focus size, the transverse position and the crossing angle on the reflectivity of the grating is investigated using the improved model. It is demonstrated that the phase conjugate reflectivity depends sensitively on the transverse features of the interacting beams with a transverse shift in the position of the pump beams yielding a threefold improvement in reflectivity.
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ISSN:1094-4087
1094-4087
DOI:10.1364/OE.20.006887