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Excess noise in low Fresnel number unstable resonators

Mcdonald, GS, New, GHC and Woerdman, JP 1999, 'Excess noise in low Fresnel number unstable resonators' , Optics Communications, 164 (4-6) , pp. 285-295.

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    Abstract

    Numerical calculations of excess noise factors in low Fresnel number unstable resonators are described in detail. Computed mode profiles in one transverse dimension together with associated Petermann K-factors are presented; dynamical considerations such as injected wave excitation are also examined. The properties of the zero-order modes are consistent with virtual source theory and with a simple formula for K based on a geometrical optics approximation. While virtual source theory is asymptotic, we find that it can make good predictions for Fresnel numbers as low as unity. Full numerical calculations are however needed to determine accurate mode profiles and K-factors in some regimes. A new technique for calculating accurate higher-order mode profiles is also developed and this is employed to evaluate K-factor dependencies of the first two higher-order even modes.

    Item Type: Article
    Themes: Energy
    Media, Digital Technology and the Creative Economy
    Subjects outside of the University Themes
    Schools: Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering > Materials & Physics Research Centre
    Journal or Publication Title: Optics Communications
    Publisher: Elsevier
    Refereed: Yes
    ISSN: 0030-4018
    Depositing User: GS McDonald
    Date Deposited: 14 Oct 2011 11:29
    Last Modified: 20 Aug 2013 18:14
    URI: http://usir.salford.ac.uk/id/eprint/18339

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