Figure 3
Dynamic of orbital angular momentum conservation. Numerical results of upconverted gHLG\(_{3,1}^{\alpha }\) in plane Fig. 1(iv). The SH signal intensity profile, phase profile, and overlay of electric field amplitude and phase profiles are generated with a fundamental pump obtained through astigmatic transform of LG\(_{3,1}\) beam under different tilted angle \(\alpha \in [0, 15^\circ ]\) of the spherical lens. On the electric field images, the white dash-line circles point out the vortices while the white crosses show the emergence of anti-vortices.
