Fig. 1. (a) Crystal three-dimensinal temperature distribution with pump power of 100 W; (b) temperature distribution curves along crystal central axis with pump power of 30, 50, 80, 100 W

Fig. 2. (a) Three-dimensional image of OPD; (b) two-dimensional image of OPD

Fig. 3. (a) Near field Fresnel diffraction spot of fundamental Gaussian beam; (b) near field Fresnel diffraction spot with additional phase; (c) center lines

Fig. 4. (a) Fraunhofer diffraction spot of fundamental Gaussian beam; (b) Fraunhofer diffraction spot with additional phase; (c) center lines