Diode-pumped cw Nd:YAG three-level laser at 869 nm.
We report for the first time (to our knowledge) a diode-pumped Nd:YAG laser emitting at 869 nm based on the (4)F(3/2)-(4)I(9/2) transition, generally used for a 946 nm emission. Power of 453 mW at 869 nm has been achieved in cw operation with a fiber-coupled laser diode emitting 35.4 W at 809 nm. Intracavity second-harmonic generation in the cw mode has also been demonstrated with power of 118 mW at 435 nm by using a BiB(3)O(6) nonlinear crystal. In our experiment, we used a LiNbO(3) crystal lens to complement the thermal lens of the laser rod, and we obtained good beam quality and high output power stability.
School of Science, Changchun University of Science and Technology, Changchun 130022, China. optik@sina.com
Yanfei
Y
Lü
Jing
J
Xia
Weibo
W
Cheng
Jifeng
J
Chen
Guobin
G
Ning
Zuoliang
Z
Liang