Large Petermann factor in chaotic cavities with many scattering channels

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dc.creatorFrahm, K.
dc.creatorSchomerus, H.
dc.creatorPatra, M.
dc.creatorBeenakker, C. W. J.
dc.date1999-09-08
dc.date.accessioned2026-07-07T02:35:50Z
dc.date.available2026-07-07T02:35:50Z
dc.descriptionThe quantum-limited linewidth of a laser cavity is enhanced above the Schawlow-Townes value by the Petermann factor K, due to the non-orthogonality of the cavity modes. The average Petermann factor $<K>$ in an ensemble of cavities with chaotic scattering and broken time-reversal symmetry is calculated non-perturbatively using random-matrix theory and the supersymmetry technique, as a function of the decay rate $Γ$ of the lasing mode and the number of scattering channels N. We find for $N\gg 1$ that for typical values of $Γ$ the average Petermann factor $<K>\propto \sqrt{N}\gg 1$ is parametrically larger than unity.
dc.description7 pages, 2 figures, europhys.sty (macro included)
dc.identifierhttps://arxiv.org/abs/chao-dyn/9909012
dc.identifierhttp://arxiv.org/abs/chao-dyn/9909012
dc.identifierEurophys. Lett. 49, pp. 48-54 (2000)
dc.identifierdoi:10.1209/epl/i2000-00118-y
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/15757
dc.subjectChaotic Dynamics
dc.subjectMesoscale and Nanoscale Physics
dc.titleLarge Petermann factor in chaotic cavities with many scattering channels
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