Watt-level 1173 nm Laguerre-Gaussian mode generation from a self-Raman Nd:GdVO4 laser

Yuanyuan Ma, Haruna Sugahara, Andrew J. Lee, Helen M. Pask, Katsuhiko Miyamoto, Takashige Omatsu

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1 Citation (Scopus)
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Abstract

We demonstrate a high power (watt-level) self-Raman Nd:GdVO4 Laguerre-Gaussian (LG) mode laser by employing an off-axis needle-pumping geometry. The system selectively produces right- or left-handed LG modes by adjusting the off-axis displacement of the pump beam relative to the laser cavity. The maximum output power of the generated 1173 nm LG beam (corresponding to the first-Stokes emission of from the 882 cm-1 Raman shift) reaches 1.2 W for an absorbed pump power of 8.6 W. Furthermore, the system enables the generation of a watt-level bottle beam, formed by the coherent superposition of Gaussian and radial LG modes.

Original languageEnglish
Pages (from-to)2087-2093
Number of pages7
JournalJournal of Lightwave Technology
Volume41
Issue number7
Early online date27 Jul 2022
DOIs
Publication statusPublished - 1 Apr 2023

Bibliographical note

Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

  • Laguerre-Gaussian mode
  • bottle beam
  • self-Raman Nd:GdVO4 laser
  • off-axis needle-pumping geometry

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