Passively Q-switched quasi-three-level laser and its intracavity frequency doubling.
A passively Q-switched quasi-three-level Nd:YAG laser is intracavity frequency doubled to generate a blue laser. The 473-nm blue laser has a peak power of 37 W and a pulse width of 23 ns at a pumping power of 1.6 W. To model this laser numerically, we developed rate equations by taking into consideration both the quasi-three-level nature of the gain medium and the four-level nature of the saturable absorber. Good agreement was achieved between experimental and simulated results for both the fundamental and the second-harmonic output. The reabsorption loss of the gain medium is estimated under pulsed operation.
Wang
Chun-Wei
CW
Institute of Electro-Optical Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan.
Weng
Yi-Lung
YL
Huang
Pi-Ling
PL
Cheng
Huy-Zu
HZ
Huang
Sheng-Lung
SL