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33 W quasi-continuous-wave narrow-band sodium D2a laser by sum-frequency generation in LBO
王鹏远, 谢仕永, 薄勇, 王保山, 左军卫, 王志超, 申玉, 张丰丰, 魏凯, 晋凯, 徐一汀, 许家林, 彭钦军, 张景园, 雷文强, 崔大复, 张雨东, 许祖彦
2014 (9):
94208-094208.
doi: 10.1088/1674-1056/23/9/094208
摘要
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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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