High-power QCW microsecond-pulse solid-state sodium beacon laser with spiking suppression and D2b re-pumping.
High-power QCW microsecond-pulse solid-state sodium beacon laser with spiking suppression and D2b re-pumping.
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DOI：
10.1364/ol.41.001732
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发表时间：
2016-04
期刊：
影响因子：
3.6
通讯作者：
Q. Bian;Y. Bo;J. Zuo;Chuan Guo;Chang-an Xu;W. Tu;Yuquan Shen;N. Zong;L. Yuan;Hong-wei Gao;Q. Peng;Hong-bin Chen;Lu Feng;Kai Jin;K. Wei;D. Cui;S. Xue;Yudong Zhang;Zu-Yan Xu
中科院分区：
文献类型：
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作者：
Q. Bian;Y. Bo;J. Zuo;Chuan Guo;Chang-an Xu;W. Tu;Yuquan Shen;N. Zong;L. Yuan;Hong-wei Gao;Q. Peng;Hong-bin Chen;Lu Feng;Kai Jin;K. Wei;D. Cui;S. Xue;Yudong Zhang;Zu-Yan Xu
采用1319和1064 nm二极管泵浦Nd：YAG主振荡器和频放大系统，获得了65 W准连续微秒脉冲固体钠信标激光器，线宽0.3GHz，光束质量M2=1.38，脉宽120 μs，重复频率500 Hz。通过反馈控制，激光器的波长稳定度小于± 0.15GHz。通过在1319和1064 nm振荡器中插入倍频器，抑制了由于弛豫振荡引起的激光尖峰。钠D2 b再泵浦通过用正确的D2 a-D2 b偏移调谐电光调制器的频率来实现。在兴隆天文台进行的外场实验中，用32 W的圆偏振光束照射天空，获得了光子返回率为1820光子/cm ~ 2/s的明亮钠激光导星星。
A 65 W quasi-continuous-wave microsecond-pulse solid-state sodium beacon laser tuned to the sodium D2a line has been developed with a linewidth of 0.3 GHz, beam quality of M2=1.38, and pulse width of 120 μs at a repetition rate of 500 Hz by sum-frequency mixing 1319 and 1064 nm diode-pumped Nd:YAG master-oscillator power-amplifier systems. The laser wavelength stability is less than ±0.15 GHz through feedback controlling. The laser spiking due to relaxation oscillations is suppressed by inserting frequency doublers in both 1319 and 1064 nm oscillators. Sodium D2b re-pumping is accomplished by tuning the frequency of the electro-optic modulator with the right D2a-D2b offset. A bright sodium laser guide star with a photon return of 1820 photons/cm2/s was achieved with the laser system when a 32 W circular polarized beam was projected to the sky during our field test at the Xinglong Observatory.