High-power structured laser modes: direct generation of a vortex array

Yung-Fu Chen*, H. T. Ke, Y. C. Tseng, M. X. Hsieh, J. C. Tung, Y. H. Hsieh, H. C. Liang, Kai-Feng Huang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

The frequency degeneracy induced by the astigmatism in a nearly hemispherical cavity is originally exploited to generate vortex array laser modes with the output power up to 300 mW. The inhomogeneous Helmholtz equation is employed to derive the wave function for manifesting the characteristics of the lasing modes. The theoretical wave function explicitly reveals the role of the Gouy phase in the formation of vortex arrays. Numerical analyses are further performed to confirm that the thermal lensing effect in the laser crystal assists the lasing transverse order to increase with increasing pump power. It is believed that the high efficiency enables the present laser modes to be useful in the applications of structured vortex beams. (C) 2020 Optical Society of America

Original languageEnglish
Pages (from-to)4096-4099
Number of pages4
JournalOptics Letters
Volume45
Issue number14
DOIs
StatePublished - 15 Jul 2020

Keywords

  • LAGUERRE-GAUSSIAN MODES
  • ORBITAL ANGULAR-MOMENTUM
  • SOLID-STATE LASERS
  • ND-YAG LASER
  • GEOMETRIC MODES
  • BEAMS
  • WAVE
  • LIGHT

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