Sun, Licheng Visualization 1.avi This video shows the M2 optimization procedure of the passively Q-switched laser at the 3.9A pumping current, when the deformable mirror is controlled working from a cold start. beam profile changes;beam quality factor M 2 2018-03-23
    https://opticapublishing.figshare.com/articles/media/Visualization_1_avi/5890669
10.6084/m9.figshare.5890669.v1