Abstract
The stimulated emission (SE) in aluminum laser-induced plasma pumped in resonance with the aluminum transition at 266.04 nm is modeled. A collisional-radiative plasma model based on kinetic equations is proposed to explain the creation of the population inversion and lasing. The model predicts fast depopulation of the ground state by the absorption of resonant laser light at 266 nm and very fast population of the excited state by the cascade transitions from the laser-pumped level, which is driven optically and by collisions. The SE of the transition at 396.15 nm is studied and possible SE at 1.3 and 2.1 μm is predicted. It is confirmed by calculations that the population inversion between the and states can be created by weak pumping at several microjoule–millijoule pulse energies and results in high gain.
© 2017 Optical Society of America
Full Article | PDF ArticleMore Like This
Reto Glaus, Igor Gornushkin, and Lev Nagli
Appl. Opt. 56(13) 3699-3702 (2017)
Masamoto Otsuka
Appl. Opt. 19(23) 3904-3910 (1980)
Jan Menser, Kyle Daun, Thomas Dreier, and Christof Schulz
Appl. Opt. 56(11) E50-E57 (2017)