基于超磁致伸缩材料的高速倾斜镜的设计与应用

在目标跟踪系统中，由于大气湍流的影响导致光波振幅和相位起伏。为了提高跟踪性能，降低大气湍流造成的光斑倾斜成为了首要目标，而高速倾斜镜（FSM）则是达成这一目标的关键器件。文中介绍的高速倾斜镜利用超磁致伸缩材料（GMM）作为位移驱动元件，通过线圈的电流产生磁场控制材料的伸缩，从而驱动倾斜镜的偏转。该倾斜镜已经被应用于激光大气传输倾斜校正系统中，使湍流造成的倾斜减少了90%，光斑稳定度和光斑质量得到了明显提高。

Design and application of fast steering mirror based on GMM

In the fine tracking systems, the amplitude and phase of the beacon light is fluctuated which is caused by the atmosphere turbulence. In order to enhance the tracking system's performance, reducing the facula's vibration induced by the atmosphere turbulence becomes the primary goal, and the fast steering mirror(FSM) is the key instrument to reach that goal. In this paper giant magnetostrictive material（GMM）was used as the offset-generating component of the FSU, which was actuated by the elasticity of the GMM, which was controlled by the magnetic field generated by the current in the coil around the GMM. This fast steering mirror was applied in the tilt correction system for atmospheric laser beam propagation, and the tilt introduced by the turbulent current was reduced by 90%, the stability and concentration of the laser facula was enhanced greatly.