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- Title
An Axicon-Based Annular Pump Acousto-Optic Q-Switched Nd:GdVO 4 Self-Raman Vortex Laser.
- Authors
Liu, Jie; Duan, Yanmin; Mao, Wenjie; Jin, Xinxin; Li, Zhihong; Zhu, Haiyong
- Abstract
We report, for the first time, the generation of a 1173 nm acousto-optic Q-switched self-Raman vortex laser with an axicon-based annular pump system. A 20 mm long Nd:GdVO4 crystal was used as the self-Raman crystal. Both the fundamental field and the first-Stokes field were investigated using the respective output couplers. In comparison with both vortex fields, a noticeable beam cleaning-up effect and pulse compression were observed from the 1063 nm fundamental field to the 1173 nm first-Stokes field. A Stokes field carrying a unitary topological charge was achieved. Finally, the average output power of the first-Stokes vortex emission reached 454 mW under an incident pump power of 19.5 W, corresponding to a pulse width of 45.7 ns. It was beneficial to apply a high peak power from the Q-switched laser and self-Raman conversion to expand the applications of the vortex laser beam.
- Subjects
RAMAN lasers; Q-switched lasers; VECTOR beams; LASER beams; LASERS
- Publication
Crystals (2073-4352), 2023, Vol 13, Issue 10, p1484
- ISSN
2073-4352
- Publication type
Article
- DOI
10.3390/cryst13101484