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- Title
The frequency degeneracy range of transverse mode in an off-axis end-pumped solid-state lasers.
- Authors
Li, Jia'ning; Song, Shengbo; Huang, Gang; Zhou, Pengfei; Jiang, Zeqian; Xie, Pengjian; Liao, Wenbin; Lin, Zhanglang; Li, Bingxuan; Zhang, Ge
- Abstract
In this work, the degenerate phenomena of transverse mode's frequency in an off-axis end-pumped solid-state lasers was researched based on a semi-confocal cavity. When the off-axis distance was 0.05 mm, the beam profile was always nearly Hermite-Gaussian mode in the change of cavity length. At this time, the degenerate range of transverse modes was the cavity length to radius ratio L/R from 0.4974 to 0.5008 by the analysis of the frequency signals. When the off-axis distance was 0.10 mm, the beam profile changed from the Hermite-Gaussian mode to the geometric mode and finally back to the Hermite-Gaussian mode as cavity length varied. At this time, the degenerate range of transverse modes was L/R from 0.4974 to 0.5025 by the analysis of the frequency signals. The beam profile was nearly the geometric mode in the range of L/R from 0.4958 to 0.5092. The degeneracy range by observing beating frequency changes was more accurate and more useful than the method by comparing the beam profile changes. Furthermore, it was found that the off-axis pumping did not significantly alter the degeneracy position and range.
- Subjects
SIGNALS &; signaling
- Publication
Applied Physics B: Lasers & Optics, 2024, Vol 130, Issue 5, p1
- ISSN
0946-2171
- Publication type
Article
- DOI
10.1007/s00340-024-08226-9