Correction of walk-off-induced wavefront distortion for continuous-wave laser
Zou Hongxin†, , Chen Guozhu, Wu Yue, Shen Yong, Liu Qu
       

Beam cross sections of the generated second harmonic generated by (a) a single bulk crystal and (b) two compensating crystals at z = l/2, 3l, 10l, and 1000l.