The role of boundary conditions in kaleidoscope laser modes
McDonald, GS, Christian, JM and Huang, JG The role of boundary conditions in kaleidoscope laser modes , in: College Research Showcase Day, 16th June 2011, University of Salford, Greater Manchester, UK.
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The complex character of transverse eigenmodes in one-dimensional (1D) unstable cavity lasers has been known for many years . Early collaborations showed that the origin of such fractal (i.e., multiple spatial scale) structure lies in a subtle interplay between small-scale diffraction effects at the mirror edges and successive round-trip magnifications . Kaleidoscope lasers are intuitive generalizations of the classic strip resonator to fully-2D geometries where the feedback mirror has a non-trivial transverse shape, such as a regular polygon . The fundamental mechanism for fractal formation is preserved, but until recently these novel laser designs have remained largely unexplored. We will report on recent advances in our understanding of kaleidoscope lasers, made possible by new semi-analytical techniques. Aspects to be covered include mode patterns, eigenvalue spectra, convergence phenomena, and also the first calculations of fractal dimension for arbitrary cavity parameters.
|Item Type:||Conference or Workshop Item (Poster)|
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|
|Depositing User:||JM Christian|
|Date Deposited:||17 Oct 2011 12:47|
|Last Modified:||17 Oct 2011 14:08|
|References:|| G. P. Karman and J. P. Woerdman, Opt. Lett. 23, 1909–1911 (1998).  G. H. C. New, M. A. Yates, J. P. Woerdman, and G. S. McDonald, Opt. Commun. 193, 261–266 (2001).  G. S. McDonald et al., J. Opt. Soc. Am. B 17, 524–529 (2000); Nature 402, 138 (1999)|
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