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- W2073036943 abstract "The dynamical equations for the optical field of a single-mode quasi-isotropic laser are reviewed and reformulated in terms of Stokes parameters. In general, the new form lends itself to a numerical determination of the modes. In particular cases it simplifies finding analytical solutions. This is illustrated for three quasi-isotropic cavities, where the properties of the stable and unstable modes are found by inspection. The role of the intensity and the ellipticity of the light in creating circular anisotropies in the gain medium, through saturation, is discussed. The induced circular anisotropies explain the existence of stationary but unstable modes and the onset of polarization instabilities in normally stable modes in quasi-isotropic lasers. The paper is primarily concerned with gas lasers. Resume : Nous passons en revue et reformulons en fonction des paramtres de Stokes les Oquations dynamiques du champ optique diun laser quasi-isotropique opOrant en mode simple. Cette formulation se prŒte assez bien ‡ la dOtermination numOrique des modes. Dans certains cas une solution analytique est possible. Nous liillustrons pour trois cavitOs quasi-isotropiques os nous dOterminons par inspection les propriOtOs des modes stables et instables. Nous discutons le rUle de liintensitO et de liellipticitO de la lumire dans la production par saturation dianisotropies circulaires dans le milieu amplificateur. Les anisotropies circulaires induites expliquent la prOsence de modes stationnaires mais instables ainsi que liOmergence diinstabilitOs de polarisation chez des modes normalement stables dans un laser quasi-isotropique. Nos rOsultats siappliquent surtout aux lasers ‡ gaz. (Traduit par la rOdaction)" @default.
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- W2073036943 date "1997-03-03" @default.
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- W2073036943 title "Theory of the polarization states of quasi-isotropic lasers: A reformulation in terms of Stokes parameters" @default.
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- W2073036943 doi "https://doi.org/10.1139/p96-154" @default.
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