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- Title
Simultaneous Manipulation of the Temporal and Spatial Behaviors of Nanosecond Laser Based on Hybrid Q-Switching.
- Authors
Yang, Haoxi; Li, Yuanji; Wang, Wenrong; Feng, Jinxia; Zhang, Kuanshou
- Abstract
A hybrid Q-switching method based on a special-shaped saturated absorber was proposed for simultaneous manipulation of the temporal and spatial behaviors of a solid-state pulse laser. The temporal–spatial rate equation model of the laser was given and used to optimize the design parameter of the saturated absorber. Best spatial intensity homogenization performance can be expected using an active-passive hybrid Q-switched laser, comprising a Pockels cell and a cylinder Cr:YAG crystal with one end cut as a spherical concave surface. The optimized laser pulse width could be narrowed to 2.39 ns and the laser radial intensity distribution became quasi-super-Gaussian distribution with a radial intensity distribution ratio of 0.91, while that for the Gaussian beam was 0.84. In principle, the laser coherence can be maintained, and the laser spatial intensity distribution can be kept in a long propagation distance.
- Subjects
Q-switching; SPATIAL behavior; SOLID-state lasers; CONCAVE surfaces; RATE equation model; Q-switched lasers; LASERS; OPTICAL scanners
- Publication
Photonics, 2023, Vol 10, Issue 2, p227
- ISSN
2304-6732
- Publication type
Article
- DOI
10.3390/photonics10020227