Frequency Stabilization of a Microsecond Pulse Sodium Guide Star Laser with a Tilt- and Temperature-Tuned Etalon
Chang Xu1,4, Jun-Wei Zuo1**, Qi Bian1,5, Chuan Guo1,5, Yong Bo1, Lu Feng2, Kai Jin3, Kai Wei3, Hong-Wei Gao1, Sheng Zhang4, Yuan-Qin Xia4**, Qin-Jun Peng1, Zu-Yan Xu1
1Key Lab of Solid State Laser, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 2National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100190 3Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209 4National Key Lab of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150080 5University of Chinese Academy of Sciences, Beijing 100190
Abstract：A frequency stabilization approach is introduced for the microsecond pulse sodium beacon laser using an intra-cavity tilt- and temperature-tuned etalon based on a computer-controlled feedback system connected with a fast high-precision wavelength meter. The frequency stability of the sodium beacon lasers is compared with and without feedback loop controlling. The output wavelength of the laser is locked to the sodium D$_{2a}$ absorption line (589.159 nm) over 12 h with the feedback loop controlling technology. As a result, the sodium laser guide star is successfully observed by the telescope of National Astronomical Observatories at Xinglong. This approach can also be used for other pulses and continuous-wave lasers for the frequency stabilization.
Wang P Y, Xie S Y, Bo Y, Wang B S, Zuo J W, Wang Z C, Shen Y, Zhang F F, Wei K, Jin K, Xu Y T, Xu J L, Peng Q J, Zhang J Y, Lei W Q, Cui D F, Zhang Y D and Xu Z Y 2014 Chin. Phys. B 23 094208
2017, Vol. 34 
