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<p>An ensemble of circular geometric modes with several earlier unobserved ones as well as Laguerre-Gaussian petal modes of different orders are obtained in a 580 nm Rhodamine 6&#xa0;G dye laser pumped by pulses of 532 nm radiation via a cuvette with an axicon in a liquid or in air. The geometric modes family is illustrated by the fractal frequency spectrum of a plano-spherical resonator. Switching of geometric to Laguerre-Gaussian modes is demonstrated in a degenerate configuration of the laser resonator simply by changing the liquid in the cuvette.</p>

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Circular geometric and Laguerre-Gaussian modes in a dye laser with an axicon-based pumping scheme

  • 期刊论文

  • 发表日期：

    2026年1月22日

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  • Olga Burdukova,
  • Alexey Koromyslov,
  • Vladimir Petukhov,
  • Mikhail Semenov,
  • Yury Senatsky

摘要

An ensemble of circular geometric modes with several earlier unobserved ones as well as Laguerre-Gaussian petal modes of different orders are obtained in a 580 nm Rhodamine 6 G dye laser pumped by pulses of 532 nm radiation via a cuvette with an axicon in a liquid or in air. The geometric modes family is illustrated by the fractal frequency spectrum of a plano-spherical resonator. Switching of geometric to Laguerre-Gaussian modes is demonstrated in a degenerate configuration of the laser resonator simply by changing the liquid in the cuvette.