We report the first calculations of mode patterns of unstable-cavity lasers with truly two-dimensional transverse geometries. A detailed account of numerical techniques, incorporating a nonorthogonal beam-propagation method, and results for cavities with a range of transverse symmetries, such as regular polygonal and rhomboid, are presented. In view of the beautiful complexity of the eigenmodes predicted, a novel kaleidoscope laser is proposed.
© 2000 Optical Society of America
(030.4070) Coherence and statistical optics : Modes
(050.1940) Diffraction and gratings : Diffraction
(110.1220) Imaging systems : Apertures
(120.2040) Instrumentation, measurement, and metrology : Displays
(140.3410) Lasers and laser optics : Laser resonators
G. S. McDonald, G. P. Karman, G. H. C. New, and J. P. Woerdman, "Kaleidoscope laser," J. Opt. Soc. Am. B 17, 524-529 (2000)