High-power and high-quality, green-beam generation by employing a thermally near-unstable resonator design.
We have obtained green-beam quality of M2 = 6.2 at an average output power of 120 W by intracavity frequency doubling of a diode-side-pumped, Q-switched Nd:YAG rod laser with a repetition rate of 10 kHz and an optical-to-optical conversion efficiency of 15.2%. To achieve high-beam quality at high average power, the laser employs a thermally near-unstable resonator design with two-rod birefringence compensation in an L-shaped flat-flat cavity. The output power fluctuation of the green laser remains less than 0.9% in 4 h.
Bo
Yong
Y
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, China. boyong@aphy.iphy.ac.cn
Geng
Aicong
A
Bi
Yong
Y
Sun
Zhipei
Z
Yang
Xiaodong
X
Peng
Qinjun
Q
Li
Huiqing
H
Li
Ruining
R
Cui
Dafu
D
Xu
Zuyan
Z