Yellow-green 52.3W laser at 556nm based on frequency doubling of a diode side-pumped Q-switched Nd:YAG laser.
We demonstrate a high-power 556nm yellow-green laser generated by intracavity frequency doubling of a diode side-pumped Nd:YAG laser at 1112nm. A symmetrical L-shaped flat-flat cavity was employed to implement efficient operation of the low-gain 1112nm transition and to achieve good power scalability. The coatings of the cavity mirrors were carefully designed to optimize the performance of the laser, and a 92W continuous wave laser output at 1112nm was achieved when the pumping power of the laser diodes reached 960W. By intracavity frequency doubling of the fundamental laser in a lithium triborate crystal, the maximum power of the frequency-doubled output at 556nm was found to be as high as 52.3W with a pulse repetition frequency of 10kHz. This corresponds to an optical-to-optical conversion efficiency of about 5.4%.
Wang
Zhichao
Z
Research Center for Laser Physics and Technique, Key Laboratory of Functional Crystal and Laser Technology,Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
Peng
Qinjun
Q
Bo
Yong
Y
Xu
Jialin
J
Xie
Shiyong
S
Li
Chaoyang
C
Xu
Yiting
Y
Yang
Feng
F
Wang
Yuanbin
Y
Cui
Dafu
D
Xu
Zuyan
Z