As one crucial component for the latest generation of adaptive optics, tremendous efforts have been put into the development of high performance 20 W class sodium laser guide star laser system. Two such systems, the continuous wave laser by Toptica, and the quasi-continuous pulse laser by TIPC were extensively studied with simulation and field tests. A new type of 20 W class sodium laser, macro–micro pulse laser, is currently being developed by CIOMP. In this paper, we will study its on-sky performance with simulation based on Monte Carlo rate equation method. The predicted coupling efficiency for this laser in the zenith direction in Changchun is 179.73 photons s⁻¹ W⁻¹/(atoms m⁻²). The variation of coupling efficiency of this type of laser with pointing direction and the effect of D2b repumping are also studied and reported in this paper.

作为最新一代自适应光学系统的重要组成部分，已为开发高性能20 W级钠激光导星激光系统付出了巨大的努力。通过仿真和现场测试，对Toptica的连续波激光器和TIPC的准连续脉冲激光器这两个系统进行了广泛的研究。CIOMP目前正在开发一种新型的20 W类钠激光器，微脉冲激光器。在本文中，我们将通过基于蒙特卡洛速率方程法的仿真研究其空中性能。该激光在长春天顶方向的预测耦合效率为179.73光子s ^-1 W ^-1 /（原子m ^-2）。本文还研究和报道了这种类型的激光器的耦合效率随指向的变化以及D2b注入的影响。