Journal
JOURNAL OF OPTICS
Volume 23, Issue 7, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2040-8986/ac067d
Keywords
Pr; YLF laser; off-axis pumping; mode selection; beam shaping; laser resonator; optical vortex lattices
Categories
Funding
- Japan Society for the Promotion of Science (JSPS) [P19352]
- JSPS KAKENHI [JP16H06507, JP17K19070, JP18H03884]
- JST Core Research for Evolutional Science and Technology (CREST) [JPMJCR1903]
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This study presents the direct generation of optical vortex lattice (OVL) modes from a diode-pumped Pr:YLF laser by utilizing off-axis and defocused pumping geometries, resulting in more than 40 phase singularities. The observed OVL modes are well explained by a theoretical analysis based on the superposition of Hermite-Gaussian modes. The study also discusses the intracavity frequency doubling of the OVL modes and suggests potential applications in fundamental optical science and advanced material engineering.
We report on the direct generation of optical vortex lattice (OVL) modes from a diode-pumped Pr3+:LiYF4 (Pr:YLF) laser achieved by employing off-axis (transverse) and defocused (longitudinal) pumping geometries in the laser medium. OVL modes with more than 40 phase singularities are generated. The experimentally observed OVL modes are well supported by a theoretical analysis based on the superposition of Hermite-Gaussian modes. We also discuss the intracavity frequency doubling of the OVL modes. The proposed OVL mode laser system can be applied to fundamental optical science and advanced material engineering.
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