33 W quasi-continuous-wave narrow-band sodium D2a laser by sum-frequency generation in LBO
Wang Peng-Yuan (王鹏远)a b, Xie Shi-Yong (谢仕永)a, Bo Yong (薄勇)a, Wang Bao-Shan (王保山)a, Zuo Jun-Wei (左军卫)a, Wang Zhi-Chao (王志超)a, Shen Yu (申玉)a b, Zhang Feng-Feng (张丰丰)a, Wei Kai (魏凯)c, Jin Kai (晋凯)b c, Xu Yi-Ting (徐一汀)a, Xu Jia-Lin (许家林)a, Peng Qin-Jun (彭钦军)a, Zhang Jing-Yuan (张景园)a d, Lei Wen-Qiang (雷文强)a, Cui Da-Fu (崔大复)a, Zhang Yu-Dong (张雨东)c, Xu Zu-Yan (许祖彦)a
a Research Center for Laser Physics and Technology, Key Lab of Functional Crystal and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; b University of Chinese Academy of Sciences, Beijing 100049, China; c Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China; d Department of Physics, Georgia Southern University, Statesboro, Georgia 30460, USA
Abstract We demonstrate an all-solid quasi-continuous-wave (QCW) narrow-band source tunable to sodium D2a line at 589.159 nm. The source is based on sum-frequency mixing between lasers at 1064 nm and 1319 nm in a LBO crystal. The 1064 nm and 1319 nm lasers are produced from two diode side-pumped Nd:YAG master oscillator power amplifier (MOPA) laser systems, respectively. A 33 W output of 589 nm laser is obtained with beam quality factor M2=1.25, frequency stability better than ± 0.2 GHz and linewidth less than 0.44 GHz. A prototype 589 nm laser system is assembled, and a sodium laser guided star has been successfully observed in the field test.
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